Consulta: subjectFacets:"Water"
Registros recuperados: 237
Data/hora: 08/06/2024 12:42:02

Rendimentos de larvas de moscas em diferentes colheitas com três proporções de farelo de trigo e esterco suíno
Provedor de dados: 196
Autores: Casanovas Cosío, Enrique; Reyes Reyes, Reina; Suárez del Villar Labastida, Alexis; Álvarez Sánchez, Ana; Padilla Morales, Raúl.
The aim of the research was to compare the yields of house fly larvae using different proportions of wheat bran and swine feces as larval development medium, in a randomized block experimental design with five replications: A-100 % wheat bran; B- 50% wheat bran and 50% swine feces; C- 100% swine feces. Measurements of the temperature of the substrates, as well as the temperature and relative humidity of the place where the flies were developing were made every 24 hours. The larval yield per m2 and kg of substrate, (including the water used to moisten the larval media) were also registered. The wheat bran substrate presented the highest temperature values (36.78 oC), with values above the ambient temperature. The relative humidity varied between 44 and 68%....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water; Insects; Alternative protein; Organic residues; Substrates; Água; Insetos; Proteína alternativa; Resíduos orgánicos; Sustratos.
Ano: 2023
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/6997

Género, etnia y manejo del agua en la Sierra Mazateca.
Provedor de dados: 32
Autores: García Dávila, Alejandrina.
En comunidades indígenas de México, la organización comunitaria para la recolección y abastecimiento de agua es central para el desarrollo local. Sin embargo, el Estado ha impuesto normas que obstaculizan el funcionamiento de dicha organización. A esta situación se añade la inequidad de género, reflejada en la poca participación de las mujeres. La presente investigación analiza esta situación en dos comunidades oaxaqueñas. Utilizando datos provenientes de observación participante, entrevistas, una encuesta, dos talleres y varios recorridos de campo, se muestra cómo algunas mujeres están cuestionando los discursos que las excluyen de la toma de decisiones y abriendo espacios para sí mismas en la organización comunitaria. _______________ WATER, ETHNICITY AND...
Palavras-chave: Género; Etnia; Agua; Estado; Organización; Desarrollo rural; Maestría; Gender; Ethnicity; Water; State; Organization.
Ano: 2012
URL: http://hdl.handle.net/10521/674

Análisis de las unidades de riego con aprovechamiento superficial en la Cuenca Lerma Chapala, México.
Provedor de dados: 32
Autores: González Covarrubias, Galdino Daniel.
En el presente estudio se realizó el análisis de las Unidades de Riego con aprovechamiento superficial en la Cuenca Lerma Chapala, México, a través de la georrefenciación y caracterización de la infraestructura hidroagrícola, padrón de usuarios y catastro, integrándolos en un Modelo de Sistema de Información Geográfica (SIG). Esto permitió conocer en forma precisa la información relevante de dichas Unidades. Se caracterizaron 1,364 unidades de riego con un total de 56,266 usuarios que detentan 114,975.26 hectáreas. La longitud de la red de conducción es de 2,435 km y la longitud de la red de drenaje es de 2,643 km, y 34,965 estructuras de control.  La integración de las capas de información generadas en formato shape-file (*.shp) al Modelo de SIG de la...
Palavras-chave: Modelación; SIG; Riego; Agua; Sustentabilidad; Cuenca; Modeling; GIS; Irrigation; Water; Sustainability; Watershed; Hidrociencias; Maestría Tecnológica.
Ano: 2013
URL: http://hdl.handle.net/10521/2072

Determinación de la concentración de metales pesados en agua, suelo y cultivos regados con agua de la Presa Manuel Avila Camacho.
Provedor de dados: 32
Autores: Larenas Bazán, Nelli Natalia.
La presa Manuel Ávila Camacho se construyó para aprovechar los escurrimientos de los ríos Atoyac y Alseseca, con propósitos de riego. La contaminación de estos ríos tiene su origen en las descargas de aguas residuales urbanas e industriales, y el uso de aguas residuales no tratadas para la irrigación de cultivos agrícolas, ha contribuido en la contaminación de suelos y plantas por metales pesados (MP), lo cual representa un riesgo para la salud humana y animal. En este sentido, el objetivo de la investigación consistió en la determinación de la concentración de MP, características físicas y químicas en agua residual y suelo, así como la concentración de MP en cultivos de maíz y alfalfa ubicados en los módulos uno, dos y tres del Distrito de Riego 030...
Palavras-chave: Contaminación; Metales pesados; Agua; Suelo; Planta; Pollution; Heavy metals; Water; Soil; Plant; EDAR; Estrategias para el Desarrollo Agrícola Regional; Maestría.
Ano: 2010
URL: http://hdl.handle.net/10521/271

Género y agua en la microcuenca La joya, Querétaro, Qro.
Provedor de dados: 32
Autores: Contreras Contreras, Elsa Angélica.
México se caracteriza por ser un sistema marcado por las desigualdades en la disponibilidad, acceso y control del agua, así como por un uso ineficiente de este recurso. El acceso no depende solamente de la abundancia o escasez natural del recurso, sino de otros factores que se relacionan con la forma en que la sociedad está organizada, quiénes toman las decisiones y con base en qué criterios se maneja y se distribuye el recurso. Los objetivos de investigación planteados fueron analizar de qué manera la mala distribución del agua afecta a hombres y mujeres; determinar si el género, la edad y el estrato social de las mujeres influyen en  su uso y manejo e identificar las estrategias que llevan a cabo para el uso y manejo del agua en la microcuenca La Joya,...
Palavras-chave: Microcuenca; Género; Agua; Doméstico; Productivo; Sub-basin; Gender; Water; Household; Productive; Maestría; Desarrollo Rural.
Ano: 2011
URL: http://hdl.handle.net/10521/413

Gestión del agua público-urbana en la cabecera municipal de Tepexi de Rodríguez, Puebla.
Provedor de dados: 32
Autores: Miranda Trejo, Mario.
El objetivo de la presente investigación fue analizar los procesos de administración y de distribución del agua público-urbana para los usos doméstico, público e industrial, que controla el Ayuntamiento de Tepexi de Rodríguez, Pue. El enfoque teórico utilizado fue el de la Gestión Integral de Recursos Hídricos (GIRH), bajo el cual se evaluaron los procesos de planeación, seguimiento, participación ciudadana; principios de transparencia y equidad en el acceso al agua; así como el papel de actores sociales clave como los empresarios del mármol. Fueron entrevistados 89 habitantes de la localidad con la técnica de encuesta. La muestra (n) se calculó a través de muestreo aleatorio simple, considerando como población (N) el total de viviendas particulares...
Palavras-chave: Agua; Equidad; Gestión Integral de Recursos Hídricos; Transparencia; Equity; Hydric Resources Integral Arrangements; Water; Transparency; Estrategias para el Desarrollo Agrícola Regional; EDAR; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2195

Impacto de las acciones de rehabilitación y modernización en la productividad del distrito de riego 053, estado de Colima.
Provedor de dados: 32
Autores: Guardado Plascencia, Martín.
Las acciones y programas encaminados a la tecnificación y modernización de los distritos de riego del país han sido diseñados para mejorar la infraestructura de estos y hacer un uso eficiente del agua. Un parámetro que permite la evaluación de estas mejoras es la productividad que presentan los cultivos, relacionando su rendimiento y el aprovechamiento del agua. Con el propósito de determinar el impacto que han tenido las acciones encaminadas a mejorar la infraestructura en el distrito de riego 053 “Estado de Colima”, se recopiló, proceso y organizó la información de superficie cosechada para los cultivos perennes, que han recibido la mayor inversión para la tecnificación y modernización de las redes de conducción y distribución del agua. El estudio se...
Palavras-chave: Tecnificación; Comparación; Agua; Programas; Incremento; Improvement; Comparison; Water; Programs; Increasing; Hidrociencias; Maestría Tecnológica.
Ano: 2013
URL: http://hdl.handle.net/10521/2068

Access and Resilience: Analyzing the Construction of Social Resilience to the Threat of Water Scarcity
Provedor de dados: 7
Autores: Langridge, Ruth; University of California, Santa Cruz; rlangrid@ucsc.edu; Christian-Smith, Juliet; University of California, Berkeley; jchristi2001@gmail.com; Lohse, Kathleen A.; Global Institute of Sustainability, Arizona State University; Kathleen.Lohse@asu.edu.
Resilience is a vital attribute that characterizes a system&amp;#8217;s capacity to cope with stress. Researchers have examined the measurement of resilience in ecosystems and in social&amp;#8211;ecological systems, and the comparative vulnerability of social groups. Our paper refocuses attention on the processes and relations that create social resilience. Our central proposition is that the creation of social resilience is linked to a community&amp;#8217;s ability to access critical resources. We explore this proposition through an analysis of how community resilience to the stress of water scarcity is influenced by historically contingent mechanisms to gain, control, and maintain access to water.  Access is defined broadly as the ability of a community...
Tipo: Peer-Reviewed Insight
Palavras-chave: Access; Resilience; Vulnerability; Water.
Ano: 2006

Increased water charges improve efficiency and equity in an irrigation system
Provedor de dados: 7
Autores: Bell, Andrew Reid; Department of Environmental Studies, New York University; ab6176@nyu.edu; Ward, Patrick S.; International Food Policy Research Institute (IFPRI), Washington, D.C.; p.ward@cgiar.org; Shah, M. Azeem Ali; International Water Management Institute (IWMI), Lahore, Pakistan; Lahore University of Management Sciences (LUMS), Pakistan; a.shah@cgiar.org.
Conventional wisdom in many agricultural systems across the world is that farmers cannot, will not, or should not pay the full costs associated with surface water delivery. Across Organisation for Economic Co-operation and Development (OECD) countries, only a handful can claim complete recovery of operation, maintenance, and capital costs; across Central and South Asia, fees are lower still, with farmers in Nepal, India, and Kazakhstan paying fractions of a U.S. penny for a cubic meter of water. In Pakistan, fees amount to roughly USD 1-2 per acre per season. However, farmers in Pakistan spend orders of magnitude more for diesel fuel to pump groundwater each season, suggesting a latent willingness to spend for water that, under the right conditions, could...
Tipo: Peer-Reviewed Reports
Palavras-chave: Agent-based model; Efficiency; Equity; Irrigation; Pakistan; Water.
Ano: 2016

The Energy-Water Nexus in Texas
Provedor de dados: 7
Autores: Stillwell, Ashlynn S.; The University of Texas at Austin; Department of Civil, Architectural, and Environmental Engineering; ashlynn.stillwell@mail.utexas.edu; King, Carey W.; The University of Texas at Austin; Center for International Energy &amp; Environmental Policy; careyking@mail.utexas.edu; Webber, Michael E.; The University of Texas at Austin; Department of Mechanical Engineering; webber@mail.utexas.edu; Duncan, Ian J.; The University of Texas at Austin; Bureau of Economic Geology; duncani@beg.utexas.edu; Hardberger, Amy; Environmental Defense Fund; ahardberger@edf.org.
Tipo: Peer-Reviewed Synthesis
Palavras-chave: Energy; Policy; Texas; Water.
Ano: 2011

Manager perspectives on communication and public engagement in ecological restoration project success
Provedor de dados: 7
Autores: Druschke, Caroline Gottschalk; University of Rhode Island; cgd@uri.edu; Hychka, Kristen C.; U.S. EPA, Atlantic Ecology Division; khychka@gmail.com.
We look to a particular social-ecological system, the restoration community in Rhode Island, USA and the rivers, wetlands, marshes, and estuaries they work to protect, to draw connections between communication, community involvement, and ecological restoration project success. Offering real-world examples drawn from interviews with 27 local, state, federal, and nonprofit restoration managers, we synthesize the mechanisms that managers found effective to argue that the communication employed by resource managers in each phase of the restoration process, in prioritization, implementation, and monitoring, and for garnering broad-based support, shapes the quality of public engagement in natural resources management, which, in turn, can impact the stakeholder,...
Tipo: Peer-Reviewed Reports
Palavras-chave: Adaptive comanagement; Adaptive management; Communication; Discourse analysis; Natural resource management; Public engagement; Public participation; Restoration; River; Stakeholder engagement; Water.
Ano: 2015

Understanding leadership in the environmental sciences
Provedor de dados: 7
Autores: Evans, Louisa S; Geography, College of Life and Environmental Sciences, University of Exeter;   Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook University; louisa.evans@exeter.ac.uk; Hicks, Christina C; Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook University; Center for Ocean Solutions, Stanford University; christina.c.hicks@gmail.com; Cohen, Philippa J; Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook University; WorldFish; p.cohen@cgiar.org; Case, Peter; College of Business, Law and Governance, James Cook University; School of Business, University of West England; peter.case@jcu.edu.au; Prideaux, Murray; College of Business, Law and Governance, James Cook University; murray.prideaux@jcu.edu.au; Mills, David J; Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook University; WorldFish; d.mills@cgiar.org.
Leadership is often assumed, intuitively, to be an important driver of sustainable development. To understand how leadership is conceptualized and analyzed in the environmental sciences and to discover what this research says about leadership outcomes, we conducted a review of environmental leadership research over the last 10 years. We found that much of the environmental leadership literature focuses on a few key individuals and desirable leadership competencies. The literature also reports that leadership is one of the most important of a number of factors contributing to effective environmental governance. Only a subset of the literature highlights interacting sources of leadership, disaggregates leadership outcomes, or evaluates leadership processes...
Tipo: Peer-Reviewed Insight
Palavras-chave: Conservation; Entrepreneurship; Environmental governance; Fisheries; Forestry; Water.
Ano: 2015

UN&amp;#8211;Water and its Role in Global Water Governance
Provedor de dados: 7
Autores: Baumgartner, Thomas; University of Freiburg; thomb@bluewin.ch; Pahl-Wostl, Claudia; Institute of Environmental Systems Research, University of Osnabrueck; pahl@usf.uni-osnabrueck.de.
UN&amp;#8211;Water was established in 2003 to coordinate United Nations activities on water. There have been no scientific assessments about this coordination mechanism and, hence, we focus on the role of UN&amp;#8211;Water in global water governance. We use an analytical framework to conceptualize relevant natural and social phenomena, actors, and institutions in the field of global water governance. This framework ultimately allows an assessment of UN&amp;#8211;Water&amp;#8217;s role in this field. Our work draws upon official UN&amp;#8211;Water documents, a formal external review of UN&amp;#8211;Water, and semistructured expert interviews to assess UN&amp;#8211;Water&amp;#8217;s influence on global water discourses, particularly on the discourses of...
Tipo: Peer-Reviewed Reports
Palavras-chave: Global water governance (GWG); Integrated water resources management (IWRM); UN&amp;#8211; Water; Water and climate change.
Ano: 2013

Evaluation of two bioadsorbents for removing paracetamol from aqueous media
Provedor de dados: 69
Autores: Flores Nardy Ribeiro,Araceli Verónica; Belisário,Marciela; Moretto Galazzi,Rodrigo; Cazoni Balthazar,Daniele; Godoi Pereira,Madson de; Nardy Ribeiro,Joselito.
The frequent contamination of water resources with drugs comprises one the most important environmental problems. In order to avoid serious disturbances for aquatic life, efficient and economically viable procedures should be developed for removing common pollutants, as paracetamol. From these considerations, the present work evaluated the efficiency of sugar cane bagasse (SCB) and vegetable sponge (VS), two natural adsorbents commonly found in Brazil, for retaining paracetamol molecules dispersed in aqueous solutions. Thus, systems composed of glass columns and peristaltic pumps were optimized and, for pH, the best value was 7.0. After optimisation, adsorption isotherms were built and it was possible to calculate the MAC F values for SCB (120.5 µg/g) and...
Tipo: Journal article
Palavras-chave: Adsorption; Bioadsorbent; Paracetamol; Water.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582011000600007

Розподіл і міграція 90Sr у водяному середовищі басейну Дніпра і Чорного моря після аварії на ЧАЕС
Provedor de dados: 13
Autores: Мірзоєва, Н. Ю.
It is determined that tendencies of 90Sr concentration change in water of investigated water reservoirs in time, with a sufficient degree of adequacy, are described by exponential functions. In water of fresh water reservoirs and a northwest part of the Black Sea predicted time of 90Sr concentration decrease up to Chernobyl NPP pre-accident levels will make 39-44 years.
Tipo: Book Section
Palavras-chave: Reservoir-cooler of Chernobyl NPP; Kyiv and Kakhovka reservoirs; Black sea; Water; Strontium-90; Redistribution; Migration; Prognosis.
Ano: 2010
URL: http://repository.ibss.org.ua/dspace/handle/99011/1860

Распределение ртути в воде и донных отложениях в местах локализации струйных метановых газовыделений со дна Черного моря
Provedor de dados: 13
Autores: Костова, С. К.; Поповичев, В. Н.; Егоров, В. Н.; Плотицина, О. В.; Артёмов, Ю. Г.
Представлены современные данные о распределении ртути в районах струйных метановых газовыделений со дна Черного моря. Приведены профили вертикального распределения растворенной, взвешенной и общей ртути в воде и донных отложениях окислительной и восстановительной зон моря. Проведено сравнение распределения ртути в толще воды и донных отложениях на разных глубинах в зависимости от акустической регистрации газовых потоков. Приведены результаты содержания ртути в образцах карбонатных построек из мест струйных выходов газа. Показано, что в Черном море существует новый источник ртутного загрязнения вод.
Tipo: Journal Contribution
Palavras-chave: Струйные метановые газовыделения; Сипы; Факелы; Грязевые вулканы; Ртуть; Формы  ртути; Распределение; Концентрация; Вода; Донные отложения; Черное море; Gas bubble streams; Seep; Flares; Mud volcanoes; Mercury; Forms; Distribution; Concentration; Water; Bottom sediments; Black Sea Gas seepages Water Mercury Distribution Water Distribution Mercury http://aims.fao.org/aos/agrovoc/c_8309 http://aims.fao.org/aos/agrovoc/c_35773 http://aims.fao.org/aos/agrovoc/c_4751.
Ano: 2006
URL: http://repository.ibss.org.ua/dspace/handle/99011/312

Концентрация ртути в воде, донных отложениях и мидии Mytilus galloprovincialis Lam. на шельфе Крыма (Черное море)
Provedor de dados: 13
Autores: Рябушко, В. И.; Козинцев, А. Ф.; Костова, С. К.; Парчевская, Д. С.; Шинкаренко, В. К.
Исследовано содержание ртути в мягких тканях и раковинах мидий Mytilus galhprovinciulis Lam. в зависимо­сти от индивидуального возраста моллюсков из акваторий мыса Тарханкут, Карадагского природного запо­ведника, г. Ялты, в т.ч. глубоководного выброса хозяйственно-бытовых и сточных вод. Линейные размеры раковины мидии в зависимости от их возраста хорошо апроксимируются степенной функцией, а концентра­ция ртути в теле и раковине - квадратичной параболой. Акватория г. Ялты характеризуется высоким уровнем загрязнения мидий ртутью (выше предельно-допустимой концентрации, установленной требованиями сани­тарных норм для пищевых продуктов), начиная с самых мелких животных. Фоновые значения содержания Hg в воде во всех районах исследований ниже ПДК для природных...
Tipo: Journal Contribution
Palavras-chave: Ртуть; Вода; Донные отложения; Мидия; Черное море; Mercury; Water; Bottom sediment; Mussels; Black Sea Mercury Bottom water Sediments Mercury http://aims.fao.org/aos/agrovoc/c_4751.
Ano: 2005
URL: http://repository.ibss.org.ua/dspace/handle/99011/221

Annual report of consultancy, 1984.
Provedor de dados: 14
Autores: SHARMA, P. N.
Organization of Report: research strategy for the improvement of land and water resources of the Semi-Arid Tropics of Northeast Brazil; runoff inducement for agriculture in very Arid Zones of the Northeast Brazil; water production function of sorghum for NE Brazil; optimization of small reservoir systems for NE Brazil; seepage control; miscellaneous activities.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Consultoria; Relatorio; Regiao semi-arida; Management; Consultancy report; Northeast; Água; Manejo; Solo; Brazil; Soil; Water.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133186

PLANEJAMENTO conservacionista da propriedade agrícola: programa 26: Nordeste/Vale do Jequitinhonha.
Provedor de dados: 14
O Prosa Rural desta semana fala sobre o planejamento conservacionista de uso agropecuário para a adequação ambiental e produtiva da propriedade rural. Quem acompanhar o pesquisador Aluísio Granato de Andrade, da Embrapa Solos, vai poder compreender a necessidade de conservar e utilizar o solo e a água, com sustentabilidade. As orientações apresentadas pelo programa garantem o aumento da produção a longo prazo e, em conseqüência, o aumento da renda familiar.
Tipo: Prosa Rural (INFOTECA-E)
Palavras-chave: Água; Conservação do Solo; Propriedade Rural; Renda Familiar; Water.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1092854

Improvement of the land and water resources of the semi-arid regions of Northeast Brazil: a proposal for research.
Provedor de dados: 14
Autores: SHARMA, P. N.
Traz uma rapida descricao do clima e solo do Nordeste do Brasil e aborda o desenvolvimento de tecnologias para manejo de recursos de solo e agua na regiao.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Recursos naturais; Proposta.; Água; Irrigação; Clima; Manejo; Pesquisa; Solo.; Water; Irrigation.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/127384

Captacao de agua de chuva in situ I: comparacao de metodos da regiao Semi-Arida brasileira.
Provedor de dados: 14
Autores: SILVA, A. de S.; PORTO E. R.; BRITO, L. T. de L.; MONTEIRO, M. A. R.
Um experimento conduzido nos anos agricolas de 1982 a 1985, no campo experimental de manejo da Caatinga, EMBRAPA-CPATSA, avaliou-se tres sistemas de captacao de agua de vhuva "in situ", metodos: Guimaraes Duque, CP-Mexico e Sulcos e Camalhoes, em curva de nivel, comparando-os com o sistema tradicional de preparo do solo e plantio, em covas e no plano. O delineamento foi em blocos ao acaso com oito repeticoes, instalado em escala operacional. As condicoes climaticas influenciaram ao nivel de 1,0% de probabilidade sobre a produtividade do caupi, e a interacao clima x tratamento foi significativa ao nivel de 5,0% de probabilidade. Nos anos de precipitacoes pluviometricas espaco-temporatis irregulares, fato comum na regiao semi-arida brasileira, os metodos...
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Captacao in situ; Sequeiro; Regiao semi-arida; Management; In situ rainfall water; Rainfed agriculture; Semi-arid region; Solo; Água; Agricultura; Manejo; Soil; Water.
Ano: 1989
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133220

Water and nutrient fluxes as indicators for the stability of different land use systems on the terra firme near Manaus.
Provedor de dados: 14
Autores: SHIFT PROJECT ENV 45 (Manaus-AM).
This project has by objective the quantification of water and nutrient fluxes in an experimental plantation, which is composed of different monoculture and polyculture systems with mainly perennial crops, as well as in primary and secondary forest at EMBRAPA-CPAA (Manaus, AM, Brasil). The flux measurements are expected to provide information about the efficiency with which the different land use systems exploit the available resources (water, nutrients) on the infertile soils of the area and minimize unproductive losses, e.g., through leaching. Efficient resource utilization is seem as a procondition of sustainable land use on this site.
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Agrofloresta; Brasil; Amazonas; Manaus; Tropical rain forest; Água; Cultivo Multiplo; Floresta Tropical Úmida; Nutriente; Solo; Uso da Terra; Agroforestry; Land use; Multiple cropping; Nutrients; Soil; Water.
Ano: 1996
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/668143

PLANEJAMENTO conservacionista da propriedade agrícola: programa 26: Sul.
Provedor de dados: 14
O Prosa Rural desta semana fala sobre o planejamento conservacionista de uso agropecuário para a adequação ambiental e produtiva da propriedade rural. Quem acompanhar o pesquisador Aluísio Granato de Andrade, da Embrapa Solos, vai poder compreender a necessidade de conservar e utilizar o solo e a água, com sustentabilidade. As orientações apresentadas pelo programa garantem o aumento da produção a longo prazo e, em conseqüência, o aumento da renda familiar.
Tipo: Prosa Rural (INFOTECA-E)
Palavras-chave: Água; Conservação do Solo; Propriedade Rural; Renda Familiar; Water.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1092895

Perspectivas do uso das águas subterrâneas do embasamento cristalino no Nordeste Semi-Árido do Brasil.
Provedor de dados: 14
Autores: VALDIVIESO SALAZAR, C. R.; CORDEIRO, G. G.
Mais de 16.000 pocos ja foram perfurados nas rochas igneas metamorficas do embasamento cristalino do Semi-Arido do Nordeste do Brasil, segundo levantamento de 1983. Os aquiferos nestas formacoes sao constituidos por fraturas e fendas da rocha, cujas caracteristicas hidrogeologicas se desconhecem. Caracteristicas de vazoes esses pocos e qualidade das aguas tem marginalizado a utilizacao racional desse recurso. Assim, tem-se vazoes que variam entre 0,0 a mais de 16.000 l/h e pode-se dizer que, em geral, as aguas sao mineralizadas em maior ou menor grau, com teores de residuo seco variando entre 1 a 10 g/l. O objetivo deste trabalho e, pois, apresentar as alternativas e possibilidades de uso destas aguas subterraneas do embasamento cristalino na regiao, ainda...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Agua subterranea; Ground water.; Água; Irrigação; Manejo; Salinidade; Solo.; Water; Irrigation; Saline water; Soil.
Ano: 1989
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133646

Métodos para avaliação do uso sustentável dos recursos solo e água nos trópicos.
Provedor de dados: 14
Autores: LAL, R.
bitstream/item/202184/1/CNPMA-DOC.-03-99-11178.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Solos; Recursos sustentaveis; Metodos para avaliacao; Tropicos; Soils; Sustainable resources; Evaluation methods; Água; Tropics; Water.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/932356

Salinidade em áreas irrigadas.
Provedor de dados: 14
Autores: CORDEIRO, G. G.
bitstream/item/183908/1/FL-08025.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Sódico; Classificação; Região semi-árida; Saline; Sodic soil; Quality; Semi-arid region; Solo; Água; Irrigação; Qualidade; Solo Salino; Soil; Classification; Irrigation; Water.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/130599

Monitoramento biológico das águas no bioma Cerrado utilizando insetos aquáticos: uma revisão.
Provedor de dados: 14
Autores: SONODA, K. C.
bitstream/CPAC-2010/31553/1/doc-256.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Cerrado; Inseto; Água.; Insects; Water; Insecta.
Ano: 2009
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/697381

Sistematização do solo para irrigação: aspectos gerais e métodos.
Provedor de dados: 14
Autores: MAGALHAES, A. A. de; MANZAN, R. J.; AZEVEDO, H. M. de.
Sistematização consiste em se preparar terreno para o método de irrigação que se pretende implantar visando uma maior uniformização e eficiência na aplicação da água. O trabalho apresenta o seguinte: conceito - graus e tipos de sistematização; benefícios e limitações; fatores a serem considerados num Projeto de Sistematização do solo para irrigação; fases do planejamento de Projetos de Sistematização; demarcação do projeto em campo; execução do projeto; organização do orçamento e métodos de nivelamento de solos para irrigação.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Sistematização do solo; Métodos de irrigação; Água; Irrigação; Manejo; Solo; Irrigation; Soil; Water.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/132497

Pré-engorda de tambaquis em sistema de recirculação de água.
Provedor de dados: 14
Autores: CORREA, R. de O.; AIRES, L. de N. dos A.; TAVARES, E. J. M.; LISBOA, V.; SILVA, R. S. da; CARVALHO, A. R.
bitstream/item/227050/1/TC-34-20-BPD-V05.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Peixe; Piscicultura; Nutrição Animal; Engorda; Água; Tambaqui; Colossoma Macropomum; Fish; Animal nutrition; Water.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1135441

Spatial variation in small scale of soil wetness evaluated by different methods.
Provedor de dados: 14
Autores: TEIXEIRA, W. G.; MARQUES, J. D. de O.; HUWE, B.
Evaluations of dielectric constants E and samplings for the determination of ø and bulk density þm were carried out in four profiles of a Xanthic Ferralsol with high clay content (Latossolo Amarelao - Brazil Classification) at the Experimental Statation of Embrapa Amazonia Ocidental (Manaus, AM, Brazil). The sample were taken near the soil surface. Three undisturbed core samples and three disturbed auger samples were collected at each depth. The E was determined in advance at six points with the probe inserted vertically and three points horizontally in each depth. Results and discussion on: a) volume evaluated and probe orientation; b) topsoil and subsoil measurements; c) soil characteristics; and d) accuracy of empirical equations for the determination...
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Brasil; Amazonas; Manaus; Floresta Tropical Úmida; Relação Solo-Água; Soil water; Tropical rain forests; Water; Water balance.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/668348

Informacoes basicas para elaboracao de projetos de irrigacao.
Provedor de dados: 14
Autores: MEDEIROS, R. D. de; ROJAS, R. N. Z.
Informacoes basicas; Recursos hidricos; Potencial hidrico; Localizacao da fonte; distancia e altura de recalque; Qualidade da agua; Problemas; Precaucoes; Amostragem da agua para analise; Custo da agua; O solo; Topografia; Dimensoes e formas da area; uniformidade topografica; Acidentes topograficos; Perfil do solo; Textura e estrutura; Profundidade; Densidade do solo; Capacidade de retencao de agua; Taxa de infiltracao; Condutividade hidraulica do solo; Caracteristicas quimicas; Clima; Precipitacao pluviometrica; Vento; Umidade relativa do ar; Temperatura do ar; Evapotranspiracao potencial ou referencia; Metodos de determinacao; Equacao de hargreaves; Equacao de Blaney-Criddle; Metodo de tanque evaporimetrico; Selecao das culturas; Clima; Solo; Agua; Valor...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Precipitacao; Precipitation; Água; Chuva; Clima; Irrigação; Recurso Hídrico; Solo; Climate; Irrigation; Soil; Water.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/694585

Water and nutrient fluxes as indicators for the stability of different land use systems on the terra firme near Manaus.
Provedor de dados: 14
Autores: SHIFT PROJECT ENV 45.
This second annual report of the project summarizes the activities between January and December 1996. During this year, the project left the preparotory stage of purchasing, importing and installing equipment and entered into the stage of routine data collection and analysis.The report is divided into two parts. In the main part, the project team is presented and its acitivities during the year 1996 are briefly summarized. The annexes give detailed accounts of selected research acitivities of the project. Despite numerous problems, all project activities were in principle successful, and there were no major changes to the time plan of the project. The root distribution studies were completed. Significant progress was made in soil physical studies, soil...
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Area abandonada; Agrofloresta; Fluxo; Brasil; Amazonas; Tropical rain forest; Agroforest; Fluxes; Analysis; Água; Análise; Conservação do Solo; Floresta Tropical Úmida; Nutriente; Environmental degradation; Nutrients; Soil conservation; Water.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/667417

Calibração da técnica de Time Domain Reflectometry (TRD) para avaliação da umidade do solo, em um Latossolo Amarelo, textura muito argilosa, com diferentes valores de densidade aparente do solo - avaliação no campo.
Provedor de dados: 14
Autores: TEIXEIRA, W. G.; FACCIN, O. P.; AZEVEDO, C. P. de; HUWE, B.; SCHROTH, G.
Avaliação de umidade volumetrica do solo pela técnica de time Domain Reflectometry (TDR) para Latossolo Amarelo (Xanthic ferralsol - FAO) textura muito argilosa, com diferentes valores de p. Foram determinados os coeficientes de determinacao ajustada (R2) e o erro padrao da media. Realizou-se um ajuste por regressao multipla para P e E, selecionando-se as variaveis que contribuiam significativamente para o modelo por procedimentos de selecao stepwise. Como a variacao dos valores de p esta diretamente relacionada ao uso do solo (especie presente e o manejo praticado), foram observadas importantes diferencas entre as P das areas cultivadas e as da floresta primaria. Os valores reduzidos de P proxima as plantas de pupunha (Bactris gasipaes H.B.K.) em relacao...
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Propriedade fisica; Fluxo; Brasil; Amazonas; Tropical rain forest; Moisture; Fluxes; Água; Bactris Gasipaes; Cupuaçu; Floresta Tropical Úmida; Kudzu; Pueraria Phaseoloides; Pupunha; Solo; Theobroma Grandiflorum; Umidade; Uso da Terra; Density; Land use; Physical properties; Soil; Water.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/667398

Report on a short-term consultancy on soil and water management and farming systems for the Centro de Pesquisa Agropecuária do Trópico Semi-Árido.
Provedor de dados: 14
Autores: KAMPEN, J.
Development production systems for dry areas soil and water manangement/Farming systems.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Manejo solo e água; Área seca; Semi-Árido; Relatório de consultoria; Soil and water management; Solo; Água; Sistema de Produção; Water; Farming systems.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/162527

Pequenos reservatórios subterrâneos e superfíciais (barreiro): projeto, construção e manejo.
Provedor de dados: 14
Autores: SILVA, A. de S.; GALVÃO, C. de O.; ARAÚJO, V. de P. A.
Reune informações sobre manejo de solo e água para áreas com recursos hídricos escassos, fazendo parte de uma coleção de informações técnicas para uso em Cursos e Treinamento em Serviço, objetivando a transferência de tecnológia para os pequenos e médios produtores rurais da região nordestina do Brasil. Este trabalho trata de projeto, seleção de áreas e menejo de pequenos reservatórios subterrâneos e superfíciais.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Manejo de solo e água; Subsurface dam; Water reservoir.; Água; Armazenamento; Barragem Subterrânea; Barreiro.; Water; Soil.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133212

Water production functions of sorghum for North East Brazil.
Provedor de dados: 14
Autores: SHARMA, P. N.; ALONSO NETO, F. B.
Os resultados do experimento para determinar a função de produção com água do sorgo para as condições no Nordeste do Brasil são descritos.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Nordeste; Água; Função de Produção; Sorgo; Water.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/156632

Propriedades físicas e hídricas do solo fundamentais para dimensionamento e operação de projetos de irrigação.
Provedor de dados: 14
Autores: CHOUDHURY, E. N.
Os solos irrigados geralmente sao de zonas aridas e semi-aridas e o sucesso da irrigação depende em grande parte da qualidade do solo. Para um manejo racional e eficiente de irrigação, precisa-se conhecer certas relações que se processam entre o solo, a água do solo, a atmosfera e as plantas. O não reconhecimento da importância destas relações como também a sua nao utilização nas praticas irrigacionistas, torna difícil a atividade tanto para o técnico de irrigaçao como para o agricultor.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Propriedade; Cálculo; Solo; Água; Irrigação; Soil; Irrigation.; Water.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/153397

Demanda de água na cultura da bananeira.
Provedor de dados: 14
Autores: POSSIDIO, E. L. de.
O presente trabalho e o resultado de uma revisao de literatura sobre alguns conceitos basicos da irrigacao na cultura da bananeira: mecanismo dos estomatos na transpiracao, tensao de umidade no solo, efeito dos deficits ou rexcesso de umidade, profundidade efetiva de exploracao do solo pelo sistema radicular, efeito de nivel do lencol freatico sobre as plantas, correlacao entre a evapotranspiracao e a evaporacao do tanque, determinacao do consumo de agua pelas plantas, efeito da irrigacao na produtividade de bananeira e outros assuntos correlatos.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Consumption.; Água; Banana; Consumo; Irrigação.; Water; Irrigation.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/132916

Controle de percolação em pequenos reservatórios.
Provedor de dados: 14
Autores: LOPES, P. R. C.; SILVA, A. de S.; SHARMA, P. N.
Uns dos principais fatores que contribuem para a baixa eficiencia de utilizacao de agua em pequenos reservatorios na regiao semi-arida sao as perdas por percolacao e por evaporacao. Desta forma, torna-se de fundamental importancia o desenvolvimento e utilizacao de tecnicas apropriadas para o controle destas perdas, principalmente em solos que apresentam baixo conteudo de argila. A percolacao depende muito das propriedades hidraulicas do solo, razao pela qual varia de um tipo para outro. Varios materiais impermeabilizantes foram testados com a finalidade de se determinar sua eficiencia no controle da percolacao. Os tratamentos testados foram: 1) testemunha (reservatorio de terra local sem revestimento); 2) reservatorio revestido com argila compactada e...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Reservatório; Percolação; Impermeabilizante; Material.; Água; Custo; Perda; Revestimento.; Water.
Ano: 1991
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/154425

Evapotranspiracao em um cerrado denso e uma pastagem plantada.
Provedor de dados: 14
Autores: SILVA, L. B. P.; KLINK, C. A.; SILVA, E. M.
bitstream/CPAC-2009/24326/1/p2003_12.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: ECLIMA250; Cerrado denso.; Água; Brachiaria Brizantha; Balanço Hídrico; Evapotranspiração.; Evapotranspiration; Pastures; Water balance.; Water.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567502

Condições de armazenamento de água subterrânea em aquíferos na zona da Serra da Santa, Município de Petrolina- PE.
Provedor de dados: 14
Autores: MANTOVANI, L. E.; RICHÉ, G. R.
As condições de diaclasamento, no setor N, da Serra da Santa, oferecem possibilidades interessantes ã prospecção de água no cristalino nesta parte do município de Petrolina. O maciço rochoso que constitui a serrania situada a NE de Petrolina, se apresenta como um bloco de falha de natureza magmática gradando para núcleos granitizados que sustentam as porções mais elevadas dos relevos. Estes relevos possuem feições do tipo "inselberg", apesar de apresentarem alguns entalhes no piedmonte. A falha de deslocamento horizontal dextrógira situada ao norte do bloco de falha, destaca-se nitidamente nas imagens de satélite observadas sobretudo, pelo contraste de litologias justapostas: migmatitico da Serra da Santa pertencentes ao Complexo Migmatitico granitóide...
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Pernambuco; Petrolina; Serra da Santa.; Recurso natural; Armazenamento; Águas Subterrâneas.; Poço; Water; Groundwater flow.; Groundwater; Groundwater extraction.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/156410

A água de chuva como potencial para aumentar a disponibilidade hídrica no semiárido brasileiro.
Provedor de dados: 14
Autores: BRITO, L. T. de L.
A Embrapa, historicamente, tem disponibilizando tecnologias e conhecimentos como estratégia para a inovação e desenvolvimento da agricultura do Semiárido brasileiro, a partir de uma melhor compreensão sobre os seus recursos naturais. Com objetivos afins, as organizações sociais desta região estabeleceram canais de interlocução entre o governo e a sociedade para juntos enfrentarem o desafio de ampliar a oferta de água para atender às demandas de consumo humano, como também reduzir os riscos de segurança alimentar das famílias rurais diante da instabilidade climática regional, por meio do Programa Cisternas. A implantação desse programa teve como premissa a temática do aproveitamento da água de chuva, preconizada há quase quatro décadas em ações de pesquisa...
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Tecnologia social; Política pública; Água para consumo; Sistema de armazenamento; Barraginga; Agricultura de vazante; Barragem Subterrânea; Água Doce; Águas Pluviais; Águas Subterrâneas; Água Potável; Disponibilidade de Água; Cisterna; Agricultura Familiar; Agricultura de Subsistência; Política de Desenvolvimento; Water; Water policy; Groundwater; Rural water supply; Water reservoirs; Rural development; Rural families; Rural programs.
Ano: 2017
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1098448

Desarrollo experimental de una metodologia para instalacion de tubos de acceso y calibracion de un aspersor de neutrones.
Provedor de dados: 14
Autores: SILVA, A. de S.; GARDUÑO, M. A.
EI objetivo de esta lnvestigación, es determinar una metodologia sencilla y rápida para la instalación de tubos de acceso y calibración del aspersor de neutrones, desarrollandose através dela experimentación con la finalidad de proporcionar bases sólidas para la utilización de estos aparatos con fines de riego.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Calibração; Metodologia; Sonda de neutrons; Tubos de acesso; Instalação; Água; Planta.; Solo; Soil.; Water.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/137907

Comparação de ambientes climáticos para culturas em quatro locais do Nordeste do Brasil.
Provedor de dados: 14
Autores: LIU, W. T.
este trabalho é um resumo do relatório de visita ao ICRISAT, Hyderabab, India. O estudo teve como finalidade determinar qual dos quatro locais pre-selecionados no Nordeste brasileiro do ponto de vista das relações de ambiente climático para culturas, e ótimo para o estabelecimento de um programa de pesquisa com sistema de produção.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Climatologia agricola; Bahia; Pernambuco; Senhor do Bonfim; Caruaru; Serra Talhada; Clima; Uso da Terra; Absorção de Água; Disponibilidade de Água; Conservação da Água; Captação D´água; Agricultural runoff; Runoff; Runoff irrigation; Soil water; Soil water potential; Water.
Ano: 1977
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/127559

Utilização e conservação dos recursos hídricos em áreas rurais do Trópico Semi-Arido do Brasil: tecnologias de baixo custo.
Provedor de dados: 14
Autores: SILVA, A. de S.; PORTO, E. R.
Apresenta algumas tecnologias para utilizacao e conservacao dos recursos hidricos, que estao sendo desenvolvidos e/ou adaptadas para as condicoes aridas e semi-aridas do Nordeste do Brasil, pelo Centro de Pesquisa Agropecuaria do Tropico Semi-Arido da EMBRAPA, em Petrolina,PE . Estas tecnologias consistem de: 1. Sistema de Aproveitamento de Agua de Chuva proveniente do Escoamento Superficial para o Consumo Humano (SAES-CH), atraves de cisternas; para o Consumo Animal (SAES-CA), atraves de tanques e barreiros, para Consumo Vegetal (SAES-CV), atraves de barreiros para irrigacao de salvacao. 2. Sistema de exploracao agricola de vazante de acudes, rios e lagos, atraves de sulcos e camalhoes em nivel. 3. Sistemas de captacao de agua de chuva in situ. 4 . Metodo...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Tecnologia de baixo custo; Escoamento superficial; Vazante; Captacao de agua; Pote de barro; Capsula porosa; Manejo de solo e água; Agua de chuva; Convivência com a seca.; Água; Chuva; Cisterna; Irrigação; Microbacia; Barreiro; Recurso Hídrico; Solo.; Water resources; Irrigation; Water; Small farms.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133222

PLANEJAMENTO conservacionista da propriedade agrícola: programa 26: Centro-Oeste/Sudeste.
Provedor de dados: 14
O Prosa Rural desta semana fala sobre o planejamento conservacionista de uso agropecuário para a adequação ambiental e produtiva da propriedade rural. Quem acompanhar o pesquisador Aluísio Granato de Andrade, da Embrapa Solos, vai poder compreender a necessidade de se conservar e utilizar o solo e a água, com sustentabilidade. As orientações apresentadas pelo programa garantem o aumento da produção, a longo prazo e, em consequência, o aumento da renda familiar.
Tipo: Prosa Rural (INFOTECA-E)
Palavras-chave: Renda Familiar; Água; Propriedade Rural; Conservação do Solo; Water.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1092837

Manual de laboratórios: solo, água, nutrição vegetal, nutrição animal e alimentos: 1.coleta, acondicionamento e preparo de amostras.
Provedor de dados: 14
Autores: NOGUEIRA, A. R. de A.; MACHADO, P. L. O. de A.; CARMO, C. A. F. de S. do; FERREIRA, J. R.
Coleta; Acondicionamento e preparo de amostras; Solos; água; Tecidos vegetais; Tecidos e produtos animais; Alimentos para consumo humano.
Tipo: Livro técnico (INFOTECA-E)
Palavras-chave: Vegetal nutrition; Alimentation; Água; Alimentação; Nutrição Animal; Nutrição Humana; Nutrição Vegetal; Solo; Animal nutrition; Human nutrition; Soil; Water.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/44394

A pesquisa do CPATSA nas areas irrigadas do tropico semi-arido: resultados experimentais dos anos 1976/77.
Provedor de dados: 14
Autores: EMBRAPA. Centro de Pesquisa Agropecuaria do Tropico Semi-Arido.
Este documento apresenta, em duas partes, os resultados da pesquisa nos anos de 1976-1977 e a programação para o período de 1978-1979. Projetos das áreas irrigadas, no Projeto de Irrigação São Gonçalo, PB (DNOCS); Nos Projetos Mandacarú, BA; Bebedouro, PE, ambos da CODEVASF, e na estação Experimental de Jatinã, em PE, representando as áreas de aluvião.
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Projeto de Irrigacao; Regiao Semi-Arida; Água; Agricultura; Irrigação; Solo; Manejo; Pesquisa; Agriculture; Irrigation; Research; Soil; Water.
Ano: 1978
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/138386

Algunas consideraciones sobre manejo del suelo y del agua para el desarrollo de la agricultura tradicional en el Noreste de Brazil.
Provedor de dados: 14
Autores: SILVA, A. de S.; ANAYA GARDUÑO, M.
En Noreste de Brazíl, existe una gran variabilidad de factores de orden físico, biológico y socío-economíco, los cual es han contribuído para dísmínuír el desarrollo agrícola y ganadero de Ia regíón. Por otra parte, el agricultor tradicional a nível de subs ístencia, rechaza fuertemente Ias nuevas tecnologtas, fundamentalmente por no entender claramente Ia justificación de una determinada práctíca, ya que Ias tecnologías modernas no harrconstderado sus condícíones socia.les y economícas. Sin embargo, el "Centro de Pesquisa Agropecuaría do Trópico Semi-Ar ído'' (CPATSA/EMBRAPA), en Petrolina, PE., Brazíl , considera conveniente Ia conjugacíón de Ia tecnologta moderna con Ios sistemas tradícíonales, a través de un equipo interdisciplinario e inter...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Pote de barro; Uso; Nordeste; Management; Clay pot; Use; Northeast; Irrigação; Água; Água Salina; Clima; Manejo; Solo; Climate; Irrigation; Saline water; Soil; Water.
Ano: 1979
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133209

Avaliação qualitativa da percepção de extensionistas rurais em relação ao uso e à conservação de recursos hídricos.
Provedor de dados: 14
Autores: ROCHA, F. E. de C.; RAMOS, E. M. S.; KISHI, S. M.; MARCELINO, M. Q. dos S.; SOUSA, E. dos S. de; JÚLIO, L. DE; TIMPONI, M. R.
Avaliou-se o uso sustentável da água na agricultura tendo como base um modelo pré-estabelecido e as crenças, atitudes e valores de extensionistas rurais. Com base na fala dos entrevistados e na literatura consultada, considerou-se como sistema sustentável a interação dos seguintes fatores: recuperação e conservação de nascentes, conservação e recuperação de matas de galeria/ciliares; uso de água na agricultura; manejo e conservação do solo e gestão de resíduos. O delineamento do estudo foi correlacional com amostragem não probabilística. O tamanho da amostra foi definido pela saturação das crenças. Utilizou-se questionário com perguntas semiestruturadas aplicado na forma de entrevistas a 21 técnicos da Emater/DF. As entrevistas foram gravadas, transcritas...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Recursos hídricos; Estudo qualitativo; Análise de conteúdo; Qualitative study; Rural extension; Content analysis.; Água; Extensão Rural.; Water resources.; Water.
Ano: 2010
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/891234

Análise da pesquisa em manejo de solo e água desenvolvida em áreas com recursos hídricos escassos do México e Estados Unidos para o Semi-Árido Brasileiro.
Provedor de dados: 14
Autores: SILVA, A. de S.
Objetivando informar a visita realizada às Universidades do México e dos Estados Unidos da América do Norte, bem corno a participação na reunião sobre "A Desertificação e seu Efeito sobre a Produção Agrícola/ALCA", apresentamos, constituindo-se no principal objetivo deste Relatório Técnico, urna análise com parativa, simplLficada, das pesquisas e da estratégia de expIo ração agrícola, que estes países têm desenvolvido para as regiões secas e sua viabilidade para as regiões muito áridas, e semi-áridas brasileiras.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Região semi-árida.; Solo; Água; Manejo; Pesquisa; Recurso Hídrico.; Soil; Water resources.; Research; Water.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/156521

Programa de pesquisas prioritárias em tecnologia de irrigação para o Nordeste.
Provedor de dados: 14
Autores: MILLAR, A. A.
Introducao; antecedentes sobre o Nordeste; programa de pesquisa para as areas irrigadas; pesquisa em irrigacao; pesquisa em manejo de solo eagua para as areas irrigadas com problemas de sais; transferencia da tecnologia gerada.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Nordeste; Northeast; Management; Irrigação; Água; Manejo; Pesquisa; Salinidade; Solo; Irrigation; Research; Salinity; Soil; Water.
Ano: 1978
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/159839

Dotacao de rega do feijoeiro influenciada por regimes hidricos e adubacao fosfatada.
Provedor de dados: 14
Autores: AZEVEDO, J. A. de; MIRANDA, L. N. de; GOMES, A. C.
bitstream/CPAC-2009/24147/1/p2002_32.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Bean; Phosphate fertilizers.; Água; Feijão; Fósforo; Fertilizante Fosfatado; Manejo de Água; Irrigação por Aspersão; Phaseolus Vulgaris; Solo.; Phosphorus; Soil; Sprinkler irrigation; Water management.; Water.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567454

Como evitar perdas de água na irrigação de fruteiras.
Provedor de dados: 14
Autores: CONCEIÇÃO, M. A. F.
bitstream/item/103187/1/JFrutairrigacao.jpg
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Fruit.; Irrigacao; Recurso hidrico; Agua; Fruta; Fruticultura; Conservacao da agua; Irrigation; Water; Water resources; Irrigation water; Water management; Horticulture; Water conservation.
Ano: 2014
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/987733

Manual para gestão da água e de resíduos do processamento de peixes.
Provedor de dados: 14
Autores: LUIZ, D. de B.; SANTOS, V. R. V. dos; LIMA, L. K. F. de; FRITZ, A. R. M.; BRIGIDA, A. I. S.; SOUZA, A. L. M. de; MUÑOZ, A. E. P.; FURTADO, A. A. L.; MESQUITA, E. de F. M. de; PONSANO, E. H. G.; GUIMARÃES, J. de T.; NAVAL, L. P.; RODRIGUES, L. G. G.; IWASHITA, M. K. P.; CHICRALA, P. C. M. S.; MOREIRA, R. de F. P. M.; BORGHESI, R.; ALVES, R. R.; MARTO, V. C. de O.
O Manual para gestão da água e de resíduos do processamento de peixes é uma publicação técnica que aborda de forma organizada e didática duas questões fundamentais para gestão das indústrias de processamento de pescados nos tempos atuais: consumo de água e geração de resíduos. Para isso, reunimos uma equipe multidisciplinar com conhecimento em legislação, produção e sanidade de peixes, processamento de alimentos, melhoria de processos industriais, microbiologia, economia e estatística. Esse contexto ganha relevância diante da frequência com que diversas regiões no planeta têm sofrido com a escassez de água e com a contaminação química e orgânica dos corpos hídricos, em razão do descarte incorreto de resíduos e efluentes gerados nas indústrias. O foco no...
Tipo: Livro técnico (INFOTECA-E)
Palavras-chave: Pesca Industrial; Tecnologia de Alimento; Recurso Hídrico; Processamento; Produto Derivado de Pescado; Água; Resíduo; Industrialization; Fish; Water; Processing residues; Fisheries management.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1127919

Utilização da vermiculita no aumento da produção agrícola em áreas semi-áridas do Nordeste: 2 relatório técnico.
Provedor de dados: 14
Autores: EMBRAPA. Centro de Pesquisa Agropecuária do Trópico Semi-Árido.
Relacao dos trabalhos de pesquisa com vermiculita e pesquisadores envolvidos. Influencia da vermiculita sobre o aumento da agua disponivel e da capacidade de troca de cations (CTC) do solo. Influencia da vermiculita sobre o armazenamento da agua no solo. Influencia da vermiculita sobre a retencao de agua e CTC no solo, producao e qualidade do capim buffel em areas de caatinga. Influencia da vermiculita sobre a retencao de melao e intervalo de irrigacao no tropico Semi-arido do Nordeste. Influencia da vermiculita sobre a irrigacao de tomate industrial no tropico Semi-Arido do Nordeste. Influencia da remocao das gemas basais e do substrato no enraizamento e qualidade de mudas de videira.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Retencao; Management; Retention; Solo; Água; Manejo; Vermiculita; Soil; Vermiculite; Water.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/131947

Irrigation by porous capsule method under hidrostatic pressure.
Provedor de dados: 14
Autores: SILVA, D. A. da; CARVALLO, H. O.; SILVA, A. de S.; GHEYI, H. R.
A field experiment was contucted at an Experiment Station of EMBRAPA in Pernambuco, Brazil with the objectives to evaluate the technical feasibility of irrigation by porous capsule under hydrostatic presure and to determine the effect of plant population on corn production. The experiment tested hydrostatic pressures of 0.35, 0.50 and 0.70 m and corn populations of 1, 4, 7, 10 and 13 plants/capsule with three replicates in a randomized block design. Each replicate consisted of 10 capsules installed at 0.25 m deep along the contour lines with absolutely no slope. The hydrostatic pressure significantly influenced water release from the capsule. Total water consumption varied from 7.96 to 10 cm/ha thereby indicating the extent of water saving. The hydrostatic...
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Irrigação não convencional; Capsula porosa; Água; Irrigação; Pressão Hidrostática; Irrigation; Water.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133277

Água de chuva: pomar doméstico.
Provedor de dados: 14
Autores: BRITO, L. T. de L.; CAVALCANTI, N. de B.; SANTOS, M. L. dos; LEITE, W. de L.
A cisterna; Unidades-piloto; Aplicação de água nas fruteiras.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Pomar doméstico; Água de chuva; Horta doméstica.; Àgua; Irrigação; Cisterna; Reservatório de Água.; Water; Irrigation.
Ano: 2008
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/161796

Captação de água de chuva in situ com aração parcial.
Provedor de dados: 14
Autores: ANJOS, J. B. dos; BARON, V.; BERTAUX, S.
Trata do preparo do solo utilizando o método de aração parcial para a captação de água de chuva "in situ". Consiste nos itens seguintes: descrição da aração; implantação da cultura; tratos culturais e eficiência do prepara do solo. A adoção da aração parcial permite reduzir o tempo e o custo do preparo inicial do solo e propicia a captação da água de chuva "in situ". Além disso o mesmo arado, ainda pode ser empregado nos tratos culturais (caprinos) desempenhando a função de cultivador, sem nenhum investimento adicional para o produtor.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Captação in situ; Rainwater; Captation.; Água; Chuva; Mecanização Agrícola.; Water.
Ano: 1988
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/131475

Utilização das fontes de água no solo: emprego de cataventos e rodas de água para acionamento de bombas.
Provedor de dados: 14
Autores: MAGALHÃES, P. S. de S.
Água subterrâneas e sua utilização: Distribuição vertical das águas subterrâneas; Descarga das águas subterrâneas; Captação das águas subterrâneas; Captação dos lençóis freáticos; Poços; Energia eólica. Cataventos para o bombeamento de água; estimativa da energia dos ventos.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Catavento; Roda de água; Bomba; Captação de água; Água subterrânea.; Water.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/156412

Uma técnica simples de exploração de vazantes de açudes.
Provedor de dados: 14
Autores: SILVA, A. de S.; PORTO, E. R.; MORGADO, L. B.; MARTINS, C. E.
O trabalho foi conduzido em um acude particular situado no Km 17, a margem esquerda da BR-116 (Petrolina-Lagoa Grande), em latossolo originario de depositos ferroliticos, de textura areia franca, permeaveis, com profundidade acima de 0,80 m e de baixa fertilidade. O delineamento experimental, para cada cultura foi blocos ao acaso, com esquema fatorial de tres repeticoes. As culturas e os tratamentos empregados foram: batata-doce e milho. Tecnica desenvolvida para o tracado dos sulcos e camalhoes (em nivel), plantio, adubacao, controle de umidade no solo, colheita, irrigacao suplementar. Os resultados: perdas totais de agua no acude, distribuicao de umidade na vazante e producao de tuberculos e graos. A exploracao agricola de vazante de acude em pequenas...
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Vazante; Manejo de solo e água; Pequena irrigação; Irrigação; Açude; Água; Manejo de Água; Manejo do Solo; Irrigation; Soil; Water.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133228

Utilização de água salina de poço profundo para irrigação de forrageiras.
Provedor de dados: 14
Autores: SOARES, J. M.; CORDEIRO, G. G.; GOMES, P. C. F.; OLIVEIRA, M. C. de; POSSÍDIO, E. L. de.
Este trabalho encontra-se em andamento, no Campo Experimental da Caatinga (CPATSA/EMBRAPA), localizado em Petrolina-PE, num solo da classe oxissol cuja profundidade média é de 1,2 mm.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Forrageira; Poço profundo; Água; Água Salina; Irrigação; Water.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/135845

Água: sem ela seremos o planeta Marte de amanhã.
Provedor de dados: 14
Autores: GOMES, M. A. F.
bitstream/item/56770/1/2011AM02.pdf
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Água; Recurso hídrico; Water; Water conservation.
Ano: 2012
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/921047

Water quality and pollution reduction.
Provedor de dados: 14
Autores: NICODEMO, M. L. F.; MATTHIENSEN, A.; OLIVEIRA FILHO, E. C. de; PEREIRA, L. A.; BRITO, L. T. de L.; OTENIO, M. H.; OLIVEIRA, M. D. de; SCORZA JUNIOR, R. P.
This chapter addresses Embrapa?s contribution to target 6.3, which relates to water quality and pollution reduction. Decreasing the availability of good quality water is a growing and global concern. Monitoring water quality, coupled with the adoption of good soil and water management practices and the use of technologies to reduce the production of contaminants, can contribute significantly to minimizing this problem and ensuring good quality water for all. The present chapter sought to list search results that point out paths that can be followed.
Tipo: Parte de livro
Palavras-chave: Monitoramento da água; Prevenção de poluição; Redução da carga poluente; Uso integrado da água; Restauração do ecossistema; Qualidade da Água; Água; Poluição; Ecossistema; Water quality; Water; Environmental monitoring.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1131014

Cisterna rural: água para consumo familiar durante o período da seca.
Provedor de dados: 14
Autores: SILVA, A. de S.; SILVA, J. de S.; SILVA, J. L. B. da.
Sistema de captação de água de chuva para consumo humano (cisterna); Conservação da água de cisterna; Dimensionamento do sitema.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Consumo humano; Cisterna; Água; Water.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/156520

Sistema de produção integrado usando o concentrado da dessalinização.
Provedor de dados: 14
Autores: EMBRAPA SEMI-ÁRIDO.
O sistema de produção integrado foi desenvolvido pela Embrapa Semi-Árido para se tornar uma alternativa de uso adequado para o efluente (concentrado) do sistema de dessalinização, reduzindo os impactos ambientais e contribuindo para a segurança alimentar. Esse sistema utiliza os efluentes da dessalinização de águas subterrâneas salobras ou salinas em uma combinação de ações integradas de forma sustentável.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Erva sal; Efluente; Sistema; Concentrado; Natural resource.; Recurso natural; Água; Dessalinização; Tilápia; Viveiro.; Atriplex nummularia; Water; Natural resources; Desalination.
Ano: 2007
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/159115

Water and nutrient fluxes as indicators for the stability of different land use systems on the terra firme near Manaus.
Provedor de dados: 14
Autores: SHIFT PROJECT ENV 45 (Manaus-AM).
This is the third annual report of the project summarizing the results of 1997. The results of the biomass determination and nutrient uptake are included which were conducted during 1996/97. First results from stand hydrology (stemflow, throughfall) and soil nitrogen dynamics are incorporated. The report is devided into two parts. In the main part, the project team is presented and is activities throughout the year 1997 are briefly summarized. The annexes give detailed information on selected research activities of the project. The research programme could be conducted according to the schedule outlined in previous report. This detailed and integrated analyses of the soil nutrient and water dynamics is yet to be done. This will involve mathematical...
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Brasil; Amazonas; Manaus; Tropical rain forest; Água; Balanço Hídrico; Biomassa; Floresta Tropical Úmida; Nutriente; Solo; Transporte de Nutriente; Uso da Terra; Biomass; Land use; Nutrient uptake; Nutrients; Soil; Water; Water balance.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/667941

Manejo da água em sistema pluvial de sequeiro.
Provedor de dados: 14
Autores: SABOURIN, E.; TRIER, R.
Os recursos hídricos e as políticas da água em zona semi-árida: recursos hídricos irregulares e mal divididos. As políticas da água no Nordeste; Sistemas locais de manejo da água: Fontes de água e técnicas de captação; Barragem de terra ou açude; cacimba; Poço amazonas ou cacimbão. Utilização agrícola da água em sistema de sequeiro: agricultura de vazante, agricultura de várzea; agricultura de sequeiro. Um exemplo de gestão local de água: a comunidade de São Filipe; Os recursos em água e os sistemas de produção; Diversidade das práticas e estratégias de uso de água; Melhoria do manejo local dos recursos hídricos; Utilização integrada e multiuso dos açudes; O norte do Sertão; O sul do Sertão; Agreste; Limites e desafios ligados ao manejo descentralizado e...
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Água de chuva; Manejo de solo e água; Captação de água de chuva; Armazenamento de água de chuva; Agricultura de sequeiro; Política pública; Gestão de água; Nordeste; Rainwater; Social development; Desenvolvimento rural; Agricultura familiar; Manejo de água; Seca; Chuva; Água; Agricultura de Subsistência; Rural development; Water; Runoff.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/153318

Indicador de qualidade de uso de água em cisternas no semi-árido brasileiro (IUA-CD): relatório técnico final.
Provedor de dados: 14
Autores: SILVA, A. de S.; CEBALLOS, B. S. O. de; SILVA, C. M. M. de S.; FAY, E. F.; BRITO, L. T. de L.; AMORIM, J. S.; SILVA FILHO, P. P. da.
A água no Semiárido. Análises físicas, quimícas e microbiológicas e qualidade de água. Indicadores de sustentabilidade. Estudo de caso: Projeto ATECEL-FINEP-UFCG. Índice de qualidade de uso de água de beber em cisternas domiciliares (IUA-CD). Considerações finais. Anexo: Amostra de água na Paraíba. Amostra de água em Pernambuco. Indicadores de qualidade de água em diversos países.
Tipo: Livro técnico (INFOTECA-E)
Palavras-chave: Água de chuva; Indicador de qualidade; Sustentabilidade; Nordeste; Região semi-árida; Tratamento de água; Rainwater; Água; Água potável; Água doce; Reservatório de água; Cisterna; Armazenamento; Educação Ambiental; Water; Water quality.
Ano: 2008
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/160330

Adução e bombeamento de água para fins de irrigação.
Provedor de dados: 14
Autores: MAGALHÃES, P. S. de S.
São abordados alguns aspectos da adução e bombeamento da água para fins de irrigação. Os topicos principais: Adução: aducão por gravidade, por recalque, adutoras mixtas e peças especiais das adutoras. Bombas hidráulicas: classificação, bombas estaticas, alternativas e rotativas, Ariete hidráulico; bombas dinâmicas, curvas características, altura manométrica, perdas e rendimentos, principais tipos de bombas dinâmicas, cavitação nas bombas hidráulicas de fluxo, NPSH-Net Positive Suction head, Currea característica do sistema, bombas em paralelo, bombas em série, seleção de bombas e concepção de sistemas de recalque, instalação de conjuntos de bombeamento, procedimentos para partida e parada, bombas dinâmicas espéciais, bomba e ar comprimido e bomba injetora.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Condução; Bombeamento; Adução; Adduction; Hydraulic; Água; Hidráulica; Irrigação; Irrigation; Water.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/132501

Monitoramento do manejo de agua na cultura da videira ao nivel de campo sob irrigacao por gotejamento.
Provedor de dados: 14
Autores: SOARES, J. M.; NASCIMENTO, T.; CASTRO NETO, M. T. de; SILVA, D. D. da.
Descricao do sistema de irrigacao, avaliacao, resultados, profundidade do solo; espacamento entre plantas, monitoramento do manejo de agua, metodologia, monitoramento dos parametros climaticos e fisiologicos a planta, distribuicao horizontal do sistema radicular, distribuicao vertical de raizes da videira entre plantas, sob irrigacao por gotejamento.
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Grape; Management; Trickle irrigation; Uva; Água; Irrigação por Gotejamento; Manejo; Grapes; Water.
Ano: 1994
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133440

Captação de águas superficiais de chuvas em Barraginhas.
Provedor de dados: 14
Autores: BARROS, L. C. de.
Antecedentes; Barraginha, um projeto social; Como funciona o sistema; Metodologia de construcao das barraginhas.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Captacao; Barraginha; Manacial.; Água; Chuva.; Harvesting; Rain; Water; Water resources.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/484688

Monitoramento do manejo de agua na cultura da mangueira ao nivel de campo sob irrigacao por sulcos, utilizando tubos janelados fixos.
Provedor de dados: 14
Autores: SOARES, J. M.; NASCIMENTO, T.; CORDEIRO, G. G.
Descricao do sistema de irrigacao, monitoramento da umidade do solo, distribuicao horizontal e vertical do sistema radicular da mangueira, semi-distancia entre plantas.
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Tubo janelado fixo; Management; Furrow irrigaton; Gated pipe; Irrigação; Água; Irrigação por Sulco; Manga; Manejo; Irrigation; Mangoes; Water.
Ano: 1994
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133442

Captação in situ: água para a produção de alimentos.
Provedor de dados: 14
Autores: BRITO, L. T. de L.; ANJOS, J. B. dos.
bitstream/item/92070/1/Luiza-INT109.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Agua de chuva; Captacao in situ.; Mecanização agricola; Água; Armazenamento.; Water.
Ano: 2013
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/970595

Produtividade do maracuja-doce em resposta a niveis de tensao de agua e fertirrigacao nitrogenada em solo de cerrado.
Provedor de dados: 14
Autores: FIGUEREDO, S. F.; AZEVEDO, J. A.; ANDRADE, L. M.; JUNQUEIRA, N. T. V.; ANDRADE, L. R. M.; GOMES, A. C.
bitstream/CPAC-2009/24370/1/p2003_19.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Fruit.; Água; Fruta; Maracujá; Manejo de Água; Irrigação; Nitrogênio; Passiflora Edulis; Rendimento; Solo.; Crop yield; Irrigation; Nitrogen; Soil; Water management.; Water.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/566660

Relatorio tecnico-cientifico do treinamento sobre manejo do complexo solo, agua, planta.
Provedor de dados: 14
Autores: ARAGÃO, O. P.
Generalidades sobre o ICRISAT; Sistemas de cultivos; Bacias hidrograficas; Manejo de solo e agua em uma bacia hidrografica; Seminario das pesquisas desenvolvidas pela Universidade de Reading-Inglaterra, na Estacao Experimental do ICRISAT; Seminarios e discussoes; Relato das atividades diarias; Certificado de aproveitamento.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Plant; Management; Training; Água; Manejo; Planta; Treinamento; Solo; Soil; Water.
Ano: 1977
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/151327

Manejo e conservação do solo e da água em sistema de plantio direto no Cerrado.
Provedor de dados: 14
Autores: SA, M. A. C. de; SANTOS JUNIOR, J. de D. G. dos; FRANZ, C. A. B.
bitstream/CPAC-2010/31675/1/doc-258.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Cerrado; Solo; Água; Plantio direto; Soil; Water.
Ano: 2009
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/747825

Cisterna: água de chuva para consumo humano.
Provedor de dados: 14
Autores: BRITO, L. T. de L.; PEREIRA, L. A.
Oaproveitamento da água de chuva, como uma prática para o abastecimento doméstico e comunitário de água potável, compõe uma das diretrizes de segurança hídrica da Organização Mundial de Saúde (OMS). Neste sentido, em vários países a cisterna se tornou a tecnologia mais apropriada para o armazenamento da água de chuva para atender a demanda por água das famílias no meio rural, pelas vantagens comparativas com outras tecnologias, como baixo custo, facilidade de construção, localização próximo da residência, além de a água da chuva apresentar qualidade que, com tratamento simples (filtragem e cloração), se torna adequada para o consumo.
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Abastecimento doméstico; Segurança hídrica; Água de chuva; Armazenamento de água; Cisterna; Abastecimento de Água; Água Potável; Consumo; Disponibilidade de Água; Águas Pluviais; Captação D´água; Rural water supply; Water; Rural development; Rural population; Rural policy.
Ano: 2017
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1098562

Captacao de agua de chuva in situ III: densidade de milho.
Provedor de dados: 14
Autores: MONTEIRO, M. A. R.; SILVA, A. de S.; BRITO, L. T. de L.; PORTO, E. R.
Para se determinar as populacoes de milho variedade Centralmex, com o sistema de captacao de agua de chuva "in situ", mais adequadas as regioes com elevada irregularidade pluviometrica espaco-temporal, foram instalados experimentos nos anos agricolas de 82/83, 83/84 e 84/85 no Campo Experimental da Caatinga do CPATSA-EMBRAPA, avaliando cinco densidades de plantio (75.000, 60.000, 45.000, 30.000 e 15.000 plantas/ha). O delineamento experimental foi em blocos ao acaso com seis repeticoes. Houve um efeito altamente significativo da densidade de plantio sobre a produtividade do milho nos tres anos. A analise conjunta apresentou um efeito significativo ao nivel de 1% de probabilidade para os anos e para a interacao ano-densidade.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Captacao in situ; Sequeiro; Dry farming; Management; Agricultura; Água; Espaçamento; Manejo; Milho; Zea Mays; Agriculture; Corn; Row spacing; Water.
Ano: 1989
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/132603

Um modelo digital de degradação hídrica aplicado ao diagnóstico ambiental: Agropólo submédio do rio São Francisco.
Provedor de dados: 14
Autores: MIRANDA, J. I.; SILVA, A. de S.; RODRIGUES, G. S.
O presente trabalho mostra um modelo digital sobre o estado da degradação hídrica no agropólo gerado com um SIG considerando três variáveis:as fontes pontuais de poluição, o índice de vegetação e a distância interfluvial.
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Degradação hídrica; Água; Irrigação; Recurso Hídrico; Degradação Ambiental; Irrigation; Water; Irrigation; Water; Water resources; Environmental degradation.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1112170

Monitoramento do manejo de agua na cultura da videira ao nivel de campo sob irrigacao por sulcos, utilizando tubos janelados moveis.
Provedor de dados: 14
Autores: SOARES, J. M.; NASCIMENTO, T.; CORDEIRO, G. G.; CASTRO NETO, M. T. de; SILVA, D. D. da.
Descricao do sistema de irrigacao, monitoramento da umidade do solo, mapeamento horizontal do sistema radicular da videira sob irrigacao por sulcos, distribuicao vertical do sistema radicular.
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Tubo janelado novelo; Grape; Management; Gated pipe; Uva; Água; Irrigação por Sulco; Manejo; Grapes; Furrow irrigation; Water.
Ano: 1994
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133443

Water and nutrient fluxes as indicators for the stability of different land use systems on the terra firme near Manaus.
Provedor de dados: 14
Autores: SHIFT PROJECT ENV 45/2.
In this study, we present the effects of different fruit and timber tree species in a multistrata agroforestry system in comparison to secondary vegetation and primary forest sites on inorganic and organic P pools of a Ferralsol in the Amazon basin. The S pools were also assessed, but could not be presented here due to the length of this contribution.
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Agrofloresta; Brasil; Tropical rain forest; Água; Floresta Tropical Úmida; Nutriente; Solo; Uso da Terra; Amazonia; Agroforestry; Land use; Nutrients; Soil; Water.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/666355

Relatório de participação na 10. Reunião da Associação Latinoamericana de Ciências Agrícolas e treinamento sobre manejo de solo e água para as zonas áridas e Semi-Áridas.
Provedor de dados: 14
Autores: SILVA, A. de S.
Participação nos eventos científicos programados pela Associação Latinoamericana de Ciências Agrícolas CALCA), em Acapulco, México, durante o período de 22 a 28 de abril de 1979, com apresentação de trabalhos técnicos-cientificos desenvolvidos no Nordeste do Brasil, sobre manejo de solo e água e métodos de irrigação "não convencionais".
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Região árida; Semi-árida; Relatório.; Água; Bacia Hidrográfica; Conservação; Desertificação; Manejo; Solo.; Soil.; Desertification; Water.
Ano: 1979
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/156522

Water and nutrient fluxes as indicators for the stability of different land use systems on the terra firme near Manaus.
Provedor de dados: 14
Autores: SHIFT PROJECT ENV 45/2.
The experiments started during the first year of the second phase of this project were continued, such as studies about the effect of trees on soil phosphorus and sulfur abailability, dissolved organic nutrients in rainfall, throughfall, stemflow and soil solution. Additionally, we focussed on the effects of cover crops on tree nutrition, soil nutrient and water dynamics. Soil nitrogen and phosphorus uptake was investigated using different N-15 and P-32 tracer experiments. The fate of fertilizer nitrogen was studied with N-15 labelled ammoniumsulfate in plant, soil, soil extracts and soil solution. In laboratory incubations, the effect of leaf quality on decomposition and incorporation of nutrients into soil organic matter was studied as affected by soil...
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Brasil; Amazonas; Manaus; Tropical rain forest; Água; Floresta Tropical Úmida; Nutriente; Solo; Uso da Terra; Land use; Nutrients; Soil; Tropical rain forests; Water.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/669428

Alternativas de captacao, conservacao e uso de agua para abastecimento do meio rural.
Provedor de dados: 14
Autores: SILVA, A. de S.; LIMA, L. T. de; MACIEL, J. L.; ARAUJO, V. de P. A.
O problema da escassez ou a falta de agua para consumo humano, animal e vegetal, no meio rural, e mais intenso nas regioes aridas e semi-aridas, que correspondem a 55% das terras continentais do planeta e tem uma populacao de 628 milhoes de pessoas. Tambem e questionavel o fato de que o setor de desenvolvimento menos favorecido atualmente pela ciencia e a tecnica, e o pequeno produtor agricola principalmente pela inexistencia de uma infraestrutura hidrica a nivel das glebas rurais, que permita viabilizar os demais segmentos da unidade de producao. Os motivos expostos, de maneira simplificada, apenas oferecem pontos para reflexao e assim devem ser entendidos, porque as necessidades basicas da regiao sao muito mais complexas, com o acesso a terra, ao credito...
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Captacao; Cisterna rural; Captation; Conservation; Rural cistern; Subsurface dam; Water reservoir; Cost; Natural resource; Recurso natural; Água; Barragem Subterrânea; Barreiro; Chuva; Conservação; Custo; Tecnologia; Rain; Technology; Water.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133213

Racionalizando o uso da água e evitando o desperdício de ração em granjas de suínos.
Provedor de dados: 14
Autores: LIMA, G. J. M. M. de; AMARAL, A. L. do; PALHARES, J. C. P.; MANZKE, N. E.; DALLA COSTA, O. A.
bitstream/item/93180/1/final7137.pdf
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Racion; Granja de suínos.; Água potável; Ração.; Farms; Swine; Water.
Ano: 2013
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/972185

Agua salina: e possivel irrigar com ela.
Provedor de dados: 14
Autores: SOARES, J. M.; CORDEIRO, G. G.
Verificou-se nos tres sistemas de manejo (drenagem natural com lamina de irrigacao Li) (aproximadamente igual ao uso consuntivo das culturas); drenagem com manilhas, com a mesma lamina de irrigacao; e drenagem com manilhas, com lamina de irrigacoa igual a 1, 2, Li&gt;), uma elevada influencia das chuvas no processo de lixiviacao dos sais, o que abre boas perspectivas para o aproveitamento de agua salina para irrigacao, nas condicoes em que os experimentos estao sendo realizados. Nos testes, tem sido utilizados os capins elefante e Panicum colaratum.
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Irrigação; Água; Drenagem; Salinidade; Irrigation; Salinity; Water.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133420

Influência dos métodos de captação de água de chuva "in situ" no sistema radicular do caupi em zonas muito áridas do Nordeste brasileiro.
Provedor de dados: 14
Autores: CHOUDHURY, E. N.; SILVA, A. de S.; PORTO, E. R.
Nas regiões muito áridas, principalmente no Nordeste Brasileiro, as precipitações nâo são suficientes para atender as ne cessidades hídricas das culturas. Assim, para um melhor aproveitamento destas precipitações, é necessário a utilizaçâo de tecni cas de captaçâo de água de chuva "in situ", como também, de condicionadores de solo que aumente. o armazenamento de água e proporcione condições físicos-químicas favoráveis a um bom desenvolvimento de raízes.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Caupi; Captação; Nordeste; Região árida.; Água; Sistema Radicular.; Water.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/156145

Water ratio effect on the proteins hydrolysis tongue sole by-products (Cynoglossus senegalensis)
Provedor de dados: 5
Autores: Sylla, K. S. B.; Musabyemariya, B.; Berge, Jean-pascal; Seydi, Mg.
In this study the effectiveness of four different water ratio to hydrolyze sole by-products by using Protamex® were compared. Average proteins yields and degree of hydrolysis (DH %) of different hydrolysates were measured, and their peptide profiles were analysed by using gel filtration chromatography. It was found that by changing the hydrolysis conditions it was possible to produce hydrolysates with the same proportion of proteins (60%) and very different in peptide composition (from 294 to 13700 Da).
Tipo: Text
Palavras-chave: Coproduits; Eau; Hydrolyse enzymatique; Protéines; By-products; Water; Enzymatic hydrolysis; Proteins.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00015/12620/9505.pdf

L'utilisation des échantillonneurs passifs. Une nouvelle méthode pour évaluer la contamination chimique des masses d'eau
Provedor de dados: 5
Autores: Gourlay, Catherine; Gonzalez, Jean-louis.
The Water European Framework Directive requires the implementation of programs to monitor the chemical quality of water bodies (freshwater, transition water and seawater), based on grab measurements of concentrations of various contaminants (metals, organic compounds). The results are limited by several analytical difficulties, and the poor representativity because of the temporal variability of contamination. The passive sampling techniques, which basically consist of concentrating substances on a submerged device for a given period, and analyzing accumulated substances, should improve the monitoring, by simplifying analytical issues (lower detection limits, analysis in a simpler matrix), and allowing time integration of the contamination. Here, we...
Tipo: Text
Palavras-chave: Échantillonneurs passifs; Eau; Membrane semi-perméable (SPMD); Gradient de diffusion en couche mince (DGT); Métaux; HAP; Passive samplers; Water; Semipermeable membrane device (SPMD); Diffusive gradient in thin film (DGT); Metals; PAHs.
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00077/18850/16423.pdf

Changes in seabed morphology, mud temperature and free gas venting at the Håkon Mosby mud volcano, offshore northern Norway, over the time period 2003-2006
Provedor de dados: 5
Autores: Foucher, Jean-paul; Dupre, Stephanie; Scalabrin, Carla; Feseker, Tomas; Harmegnies, Francois; Nouze, Herve.
The Håkon Mosby mud volcano is a 1.5-km-diameter geological structure located on the Southwest Barents Sea slope at a water depth of 1,270 m. High-definition seabed mapping of the mud volcano has been carried out in 2003 and 2006. A comparative analysis of the bathymetry and backscatter maps produced from the two surveys shows subtle morphological changes over the entire crater of the mud volcano, interpreted to be the consequence of mud eruption events. Mud temperature measurements point to a persistently warm mud at shallow depth in the crater. This is explained by upward fluid advection, rather than conductive cooling of mud flows. The small-scale spatial variability in the temperature distribution may be related to mud outflows or changes in the fluid...
Tipo: Text
Palavras-chave: Sw barents sea; Cold seep ecosystems; Fluid flow; Methane; Sediment; Onshore; Fluxes; Margin; Water.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00004/11527/10261.pdf

Évaluation monétaire des services écosystémiques. Un exemple d’usage dans la mise en place d’une politique de l’eau en France
Provedor de dados: 5
Autores: Feuillette, Sarah; Levrel, Harold; Blanquart, Stéphanie; Gorin, Olivier; Monaco, Guillaume; Penisson, Bruno; Robichon, Stéphane.
In the context of the Water Framework Directive, the French Water Agencies were asked to justify exemptions, for disproportionate cost reasons, to the “good water” status in a series of river basins in 2015. The ministry of the Environment and the economists of the Water Agencies agreed on the fact that this justification would be based on cost-benefit analyses. A great number of cost-benefit analyses were carried out on water bodies or groups of water bodies. This article reports on this experience conducted by the French Water Agencies. It highlights the fact that the large majority of restoration projects generated higher costs than benefits. It suggests that the implementation of the Water Framework Directive could be considerably limited by the use of...
Tipo: Text
Palavras-chave: Environnement; Dispositifs institutionnels; Eau; Évaluation économique; Coûts disproportionnés; Environment; Institutional systems; Water; Economic valuation; Disproportionate costs.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00480/59158/61787.pdf

Quantification of Vibrio parahaemolyticus, Vibrio vulnificus and Vibrio cholerae in French Mediterranean coastal lagoons
Provedor de dados: 5
Autores: Cantet, Franck; Hervio-heath, Dominique; Caro, A; Le Mennec, Cecile; Monteil, Caroline; Quemere, Catherine; Jolivet-gougeon, Anne; Colwell, Rita R.; Monfort, Patrick.
Vibrio parahaemolyticus, Vibrio vulnificus and Vibrio cholerae are human pathogens. Little is known about these Vibrio spp. in the coastal lagoons of France. The purpose of this study was to investigate their incidence in water, shellfish and sediment of three French Mediterranean coastal lagoons using the most probable number-polymerase chain reaction (MPN-PCR). In summer, the total number of V. parahaemolyticus in water, sediment, mussels and clams collected from the three lagoons varied from 1 to &gt;1.1 x 10.3 MPN/l, 0.09 to 1.1 x 10.3 MPN/ml, 9 to 210 MPN/g and 1.5 to 2.1 MPN/g, respectively. In winter, all samples except mussels contained V. parahaemolyticus, but at very low concentrations. Pathogenic (tdh- or trh2-positive) V. parahaemolyticus were...
Tipo: Text
Palavras-chave: Vibrio; Lagoons; Shellfish; Water; Sediment; Human pathogen.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00148/25890/23889.pdf

Apports et distribution des résidus organochlorés à haut poids moléculaire dans la rade de Brest (milieu marin semi-fermé)
Provedor de dados: 5
Autores: Marchand, Michel; Caprais, Jean-claude; Cossonmannevy, Ma; Moriniere, P.
The aim of this work is to study the input, transfer and distribution processes of chlorinated insecticides (lindane, DDT) and PCB residues in a semi-closed coastal marine environment. Measurements are made in sea water, rain water and sediment samples. Distribution coefficients between sea water and sediment are determined for several organochlorine insecticide and PCB compounds. The results show an important transfer of chlorinated residues from the atmosphere to the marine environment. The highest residue levels in the sediments are observed near other urban and industrial pollution sources. Analyses of mussels show that this mollusc can be used as a biological indicator of sea water pollution. Concentration factors are determined for lindane,...
Tipo: Text
Palavras-chave: Organochlorés; Eau; Sédiments; Matière vivante; Rade de Brest; Organochlorine; Water; Sediments; Biota; Rade de Brest.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00114/22481/20162.pdf

Atmospheric concentrations, occurrence and deposition of persistent organic pollutants (POPs) in a Mediterranean coastal site (Etang de Thau, France)
Provedor de dados: 5
Autores: Castro-jimenez, J.; Mariani, G.; Vives, I.; Skejo, H.; Umlauf, G.; Zaldivar, J. M.; Dueri, Sibylle; Messiaen, Gregory; Laugier, Thierry.
Atmospheric concentrations and deposition fluxes of PCDD/F and PCB have been evaluated over a 1-year period in a Mediterranean coastal lagoon (Etang de Thau, France). Indicative PBDE air concentrations in the hot season are also reported in this work. ∑2,3,7,8-PCDD/Fs and ∑18PCBs (gas + particulate) air concentrations ranged from 67 to 1700 fg m−3 and from 13 to 95 pg m−3, respectively whereas ∑8PBDEs (gas + particulate) summer time levels varied from 158 to 230 pg m−3. The PCDD/F and PCB atmospheric occurrence over Thau lagoon and subsequent inputs to the surface waters are determined by an assemble of factors, being the seasonality of atmospheric concentration, the air mass origin and meteorological conditions important drivers. Total (wet + dry)...
Tipo: Text
Palavras-chave: PCDD/F; Dioxin-like PCB; PBDE; Air; Water.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00033/14429/12600.pdf

Evaluation of the heterotrophic activity in waters by microanalytical methods.
Provedor de dados: 5
Autores: Bertoni, R.
The radiochemical methods proposed for evaluating heterotrophic activity in waters have been severely criticized in recent years because they are not considered to be sufficiently realistic. Thus, the possibility of directly measuring the heterotrophic consumption of naturally occurring Organic Carbon (OC) in fresh water samples incubated under controlled conditions has been evaluated. The analytical performances of two OC analyzers utilizable for this purpose are discussed here, and some examples of the results obtained by the direct measurement of OC consumption are presented. The consumption rates thus measured ranged from 11.6 to 50.2 mu gC/ 1.h. Although the technique discussed here is less sensitive than radiochemical methods, the few assumptions...
Tipo: Text
Palavras-chave: Biogeochemistry; Microbiology; Carbon cycle; Organic carbon; Water; Heterotrophic organisms; Analytical techniques.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-950.pdf

Physical ageing of epoxy in a wet environment: Coupling between plasticization and physical ageing
Provedor de dados: 5
Autores: Le Guen-geffroy, Antoine; Le Gac, Pierre Yves; Habert, B.; Davies, Peter.
This paper shows how physical ageing and plasticization processes are coupled in an amine-based epoxy. The study combines several ageing conditions including thermal ageing in the dry state (from 40 to 60 °C), ageing in a humid environment (RH 50% and RH 75%) as well as immersion in seawater at several temperatures from 15 to 40 °C. First results are presented to highlight that the two processes (physical ageing and plasticization) both occur when the epoxy is immersed in water. A step-by-step approach is then used to evaluate how the plasticization process induced by the presence of water is affected by physical ageing and vice versa. It appears that the plasticization process, which leads to a large decrease in maximum stress under tensile loading, is...
Tipo: Text
Palavras-chave: Epoxy; Physical ageing; Water; Plasticization.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00512/62319/66717.pdf

Prevalence and Characterization of Shiga Toxin-Producing and Enteropathogenic Escherichia coli in Shellfish-Harvesting Areas and Their Watersheds
Provedor de dados: 5
Autores: Baliere, Charlotte; Rince, Alain; Blanco, Jorge; Dahbi, Ghizlane; Harei, Josee; Vogeleer, Philippe; Giard, Jean-christophe; Mariani-kurkdfian-, Patricia; Gourmelon, Michele.
Tipo: Text
Palavras-chave: STEC; EPEC; Shellfish; Water; MLST; PFGE; Biofilms.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00298/40904/39949.pdf

Contamination of the Bay of Biscay by polycyclic aromatic hydrocarbons (PAHs) following the T/V "Erika" oil spill
Provedor de dados: 5
Autores: Tronczynski, Jacek; Munschy, Catherine; Moisan, Karine; Guiot, Nadege; Truquet, Isabelle; Olivier, Nathalie; Men, Sophie; Furaut, Audrey.
An investigation was carried out into the PAH chemical contamination resulting from the "Erika" tanker fuel spillage of December 1999 along the French coast of the Bay of Biscay. A qualitative and quantitative assessment was conducted of this contamination in water, suspended particulate matter, sediments, and in intertidal molluscs. The chemical composition of PAHs in pre-spill and post-spill samples was determined and used to distinguish the "Erika's" fuel as the source of PAHs in the coastal environment of the Bay of Biscay. Changes in concentrations of PAHs were also assessed. The GC-MS analysis made it possible to identify and quantify parent unsubstituted PAHs, alkyl-substituted PAHs (C-PAH) and sulfur heterocycle unsubstituted and alkyl substituted...
Tipo: Text
Palavras-chave: The "Erika" oil spill; North East Atlantic; Marine molluscs; Sediments; Suspended particulate matter; Water; Chemical contamination.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-401.pdf

Fatigue behavior of natural rubber in marine environment: Comparison between air and sea water
Provedor de dados: 5
Autores: Le Gac, Pierre-yves; Arhant, Mael; Davies, Peter; Muhr, Alan.
Natural rubber has been successfully used in a marine environment for many years. However, most applications involve low dynamic loadings. Due to the emergence of marine energy recovery, wave and tidal energy converters are being developed. In some such devices, rubbers are subjected to severe cyclic loadings, very different from their previous use in air or water. Such rubbers must therefore be qualified for long-term use in sea water with high fatigue loading. This paper presents a study using a new fatigue machine that allows the fatigue behaviour of rubber in sea water to be compared to that in air. The results show that the benefit of non-relaxing conditions on fatigue lifetime of natural rubber can be significantly reduced when it is used in sea...
Tipo: Text
Palavras-chave: Natural Rubber; Water; Fatigue; Stabilisation.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00211/32240/32195.pdf

Hydrography and flow in the Lucky Strike segment of the Mid-Atlantic Ridge
Provedor de dados: 5
Autores: Thurnherr, A. M.; Reverdin, G; Bouruet Aubertot, P; Laurent, L; Vangriesheim, Annick; Ballu, V.
The Lucky Strike segment between 37 and 38N on the Mid-Atlantic Ridge is the focus of the international MoMAR program to monitor seafloor-spreading processes. During the GRAVILUCK cruise in August 2006, hydrographic, velocity and light-scattering data were collected in the rift valley at Lucky Strike in order to investigate the regional dynamics and to provide background information for the monitoring effort. The survey observations reveal a remarkably simple dynamical setting dominated by persistent northward flow transporting approximate to 0.2 Sv of water along the rift valley. Approximately half of this transport must upwell within a deep basin that occupies the northern half of the segment. In the comparatively shallow segment center, the along-valley...
Tipo: Text
Palavras-chave: Azores triple junction; Central north Atlantic; Hydrothermal vents; Particle flux; Rift valley; Heat flux; Water; Circulation; Currents; Fields.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4785.pdf

Recommandations pour garantir la qualité des données de surveillance par échantillonnage passif. Outils émergents
Provedor de dados: 5
Autores: Ghestem, J-p; Togola, A; Lardy-fontan, S; Guigues, N; Tixier, C; Larose, A; Miège, C.
The report prepared up within the AQUAREF program for 2015 provides recommendations to ensure the quality of passive sampling monitoring data. This type of sampling method could in the future be used in regulatory monitoring, and it seems necessary to prepare the tools, procedure that will be able to ensure the reliability of such data. The report first proposes an organization of the chain of responsibilities between: * the customer, * a pilot in charge of contacts with customer, sampling operations and of the the final report * and the laboratory which would be in charge of the analytical part on the passive sampling tool transmitted by the pilot. This organization is considered as an example. Other organizations are possible, provided they specify the...
Tipo: Text
Palavras-chave: Échantillonnage passif; Contrôles qualité; Eau; Échange de données; Passive sampling; Quality control; Water; Data exchange.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00619/73077/72216.pdf

Change in the structure of Escherichia coli population and the pattern of virulence genes along a rural aquatic continuum
Provedor de dados: 5
Autores: Petit, Fabienne; Clermont, Olivier; Delannoy, Sabine; Servais, Pierre; Gourmelon, Michele; Fach, Patrick; Oberle, Kenny; Fournier, Matthieu; Denamur, Erick; Berthe, Thierry.
The aim of this study was to investigate the diversity of the E. coli population, focusing on the occurrence of pathogenic E. coli, in surface water draining a rural catchment. Two sampling campaigns were carried out in similar hydrological conditions (wet period, low flow) along a river continuum, characterized by two opposite density gradients of animals (cattle and wild animals) and human populations. While the abundance of E. coli slightly increased along the river continuum, the abundance of both human and ruminant-associated Bacteroidales markers, as well as the number of E. coli multi-resistant to antibiotics, evidenced a fecal contamination originating from animals at upstream rural sites, and from humans at downstream urban sites. A strong spatial...
Tipo: Text
Palavras-chave: Water; Sediment; Pathogenic E. coli; Virulence gene; Shiga toxin.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00378/48887/49328.pdf

Occurrence of Bacterial Pathogens and Human Noroviruses in Shellfish-Harvesting Areas and Their Catchments in France
Provedor de dados: 5
Autores: Rince, Alain; Baliere, Charlotte; Hervio-heath, Dominique; Cozien, Joelle; Lozach, Solen; Parnaudeau, Sylvain; Le Guyader, Francoise S.; Le Hello, Simon; Giard, Jean-christophe; Sauvageot, Nicolas; Benachour, Abdellah; Strubbia, Sofia; Gourmelon, Michele.
During a 2-year study, the presence of human pathogenic bacteria and noroviruses was investigated in shellfish, seawater and/or surface sediments collected from three French coastal shellfish-harvesting areas as well as in freshwaters from the corresponding upstream catchments. Bacteria isolated from these samples were further analyzed. Escherichia coli isolates classified into the phylogenetic groups B2, or D and enterococci from Enterococcus faecalis and E. faecium species were tested for the presence of virulence genes and for antimicrobial susceptibility. Salmonella members were serotyped and the most abundant serovars (Typhimurium and its monophasic variants and Mbandaka) were genetically characterized by high discriminative subtyping methods....
Tipo: Text
Palavras-chave: Campylobacter; Salmonella; Vibrio; HuNoVs; Fecal bacterial indicators; Shellfish; Water.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00461/57243/59243.pdf

Yield stress changes induced by water in polyamide 6: Characterization and modeling
Provedor de dados: 5
Autores: Le Gac, Pierre-yves; Arhant, Mael; Le Gall, Maelenn; Davies, Peter.
This paper considers the effect of water content on mechanical properties of polyamide 6 when used in a humid environment. First an experimental section presents the tensile behavior of polyamide with different amounts of water, with and without a through-thickness water gradient. Water profiles are introduced by immersion in sea water at 25 °C. The effect of testing temperature is also investigated in order to consider the influence of macromolecular chain mobility on the mechanical behavior. Then, in a second section, modelling of yield stress is proposed based on physical considerations. This can be used for life time prediction of PA6 in humid environment when plasticization is the main degradation mechanism.
Tipo: Text
Palavras-chave: Yield stress; Water; Polyamide; Plasticization; Prediction.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00371/48208/48321.pdf

Impact de l'aquaculture marine sur l'environnement : aspects juridiques et économiques
Provedor de dados: 5
Autores: Paquotte, Philippe.
Aquaculture is an economic activity which is characterised by a great dependence on environmental conditions. Therefore aquaculture development is subdued to institutional context which defines the rules for use and conservation of the environment. This paper analyses the impact of marine environment regulations on economic operating of aquaculture enterprises and on industrial dynamics. Because aquaculture enterprises use a collective good, an economic approach of aquaculture has to take into account not only the relations between enterprises and environment, but also the relations between the enterprises themselves, through production externalities. In this study, several economic tools are considered in order to incite enterprises to integrate pad of...
Tipo: Text
Palavras-chave: Sustainability; Development policies; Fiscal policies; Regulations; Environmental protection; Water; Environmental impact; Marine environment; Aquaculture; SEM; Durabilité; Politique de développement; Politique fiscale; Réglementation; Protection de l'environnement; Eau; Impact sur l'environnement; Milieu marin; Aquaculture.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/1994/publication-4018.pdf

Monsoon variability and deep oceanic circulation in the western equatorial Pacific over the last climatic cycle: Insights from sedimentary magnetic properties and sortable silt
Provedor de dados: 5
Autores: Kissel, Catherine; Laj, Carlo; Kienast, Markus; Bolliet, Timothe; Holbourn, Ann; Hill, Paul; Kuhnt, Wolfgang; Braconnot, Pascale.
Magnetic and grain size properties of a sediment core located in the western equatorial Pacific, off the southeastern tip of the Philippine island of Mindanao, are presented in an effort to reconstruct past changes in the East Asian Monsoon and deep ocean circulation during the last 160 kyrs. The sedimentary concentration of magnetic particles, interpreted to reflect past changes in runoff from Mindanao, varies almost in antiphase with Northern Hemisphere insolation. This suggests that precipitation was lower in the western equatorial Pacific region during boreal insolation maxima and thus corroborates model results showing opposing trends in precipitation between land and the marine realm there. Variations in the grain size distribution of the inorganic...
Tipo: Text
Palavras-chave: North atlantic; Grain size; Water; Core; Mindanao; Paleoceanography; Susceptibility; Anisotropy; Remanence; Iceland.
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00207/31854/30262.pdf

Variability in nomadism: environmental gradients modulate the movement behaviors of dryland ungulates
Provedor de dados: 5
Autores: Nandintsetseg, Dejid; Bracis, Chloe; Leimgruber, Peter; Kaczensky, Petra; Buuveibaatar, Bayarbaatar; Lkhagvasuren, Badamjav; Chimeddorj, Buyanaa; Enkhtuvshin, Shiilegdamba; Horning, Ned; Ito, Takehiko Y.; Olson, Kirk; Payne, John; Walzer, Chris; Shinoda, Masato; Stabach, Jared; Songer, Melissa; Mueller, Thomas.
Studying nomadic animal movement across species and ecosystems is essential for better understanding variability in nomadism. In arid environments, unpredictable changes in water and forage resources are known drivers of nomadic movements. Water resources vary temporally but are often spatially stationary, whereas foraging resources are often both temporally and spatially variable. These differences may lead to different types of nomadic movements: forage‐ vs. water‐driven nomadism. Our study investigates these two different types of nomadism in relation to resource gradients from mesic steppe to xeric desert environments in Mongolia's Gobi‐Steppe Ecosystem. We hypothesized that in the desert, where water is a key resource, animals are more water‐dependent...
Tipo: Text
Palavras-chave: Animal movement; Arid; Forage; Nomadism; Recursion; Resource; Ungulate; Water.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00590/70257/68310.pdf

Fatigue of improved polyamide mooring ropes for floating wind turbines
Provedor de dados: 5
Autores: Chevillotte, Yoan; Marco, Yann; Bles, Guilhem; Devos, Karel; Keryer, Mathieu; Arhant, Mael; Davies, Peter.
This paper describes a study of the fatigue characterization of polyamide mooring ropes for floating wind turbines. Under some conditions polyester ropes, which are favoured for offshore oil and gas platform station-keeping, are too stiff for wind turbine moorings, and polyamide may be a suitable alternative. While early studies on fatigue of braided nylon ropes showed very short lifetimes some recent results have indicated that it is possible to significantly enhance lifetime by modifying rope construction and improving fibre coatings. In this paper yarn-on-yarn abrasion testing is used first to evaluate a new yarn coating. Significant lifetime enhancement was noted, so fatigue testing of ropes was then performed. Results confirm that excellent fatigue...
Tipo: Text
Palavras-chave: Fatigue; Rope; Nylon; Mooring; Water; Floating wind turbine.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00607/71884/70609.pdf

Etude ecologique des vibrions du bassin d'Arcachon
Provedor de dados: 5
Autores: Marchand, Michel.
Water and sediment samples monthly collected from Arcachon Bay (Gironde, France) were examined during three years for the presence of marine vibrios. V. cholerae serotype 01 was never detected. On the other hand, the Eyre River and mouth contain non-agglutinating V. cholerae (127 strains) principally in water. The low temperatures slow their development down without stopping it completely. V. parahaemolyticus (257 strains) present in the same areas is particularly isolated from water when the aquatic medium temperature rises to 15 degree C. V. alginolyticus (638 strains) settles the whole Bay, except the river, in any season. The low temperatures promote growth of V. metschnikovii (203 strains) very tolerant towards salinity. V. anguillarum (46 strains)...
Tipo: Text
Palavras-chave: Vibrio metschnikovii; Vibrio anguillarum; Vibrio alginolyticus; Vibrio cholerae; Vibrio; Marine environment; Microorganisms; Sediments; Salinity effects; Temperature effects; Ecology; Water.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-998.pdf

Successful detection of pathogenic Shiga-toxin-producing Escherichia coli in shellfish, environmental waters and sediment using the ISO/TS-13136 method
Provedor de dados: 5
Autores: Baliere, Charlotte; Rince, Alain; Thevenot, Delphine; Gourmelon, Michele.
The presence of highly pathogenic Shiga-toxin-producing Escherichia coli (STEC) in shellfish, upstream waters and sediment from coastal shellfish sites was evaluated using the ISO/TS-13136 method. Shellfish (oysters, mussels and cockles), water and sediment samples were collected monthly over a period of 1 year. The method used real-time PCR detection of stx1, stx2 and eae genes and genetic markers corresponding to the five major serogroups (O157, O26, O103, O111 and O145) on enrichment broths and the identification of STEC when these genes and markers were detected. stx genes were detected in the broth of 33% of shellfish batches (n = 126), 91% of water samples (n = 117) and 28% of sediment (n = 39). One stx1+, eae+ O26:H11 strain was isolated from a...
Tipo: Text
Palavras-chave: Eae; Sediment; Shellfish; Shiga-toxin-producing Escherichia coli; Stx; Water.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00250/36124/34975.pdf

Diagnostic moléculaire de l'origine des contaminations fécales dans l'environnement littoral - Développement de marqueurs Bacteroidales spécifiques de l'hôte
Provedor de dados: 5
Autores: Mieszkin, Sophie.
Human and animal faecal pollution affects environmental water in inland and coastal areas, with negative implications for recreational uses, public safety and shellfish sanitary status due to the presence of enteric pathogens. Starting from 2011, the revised Bathing Water European Directive (2006/7/CE) requires the establishment of bathing water profiles with an inventory and study of the pollution sources likely to affect water quality. The faecal microbiological indicators used in these regulations, Escherichia coli and enteroccoci, cannot distinguish between human and animal faecal contamination. Thus, alternative methods, that focus on target microorganisms such as bacteria belonging to the Bacteroidales order were developed or are being developed to...
Tipo: Text
Palavras-chave: Contaminations fécales humaines; Porcines et ruminants; Bacteroidales; Gènes codant les ARNr 16S; PCR quantitative en temps réel; Eaux; Persistance; Huîtres; Human; Porcine and ruminant faecal contaminations; Bacteroidales; 16S rRNA genes; Quantitative real-time PCR; Water; Persistence; Oyster.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00021/13206/10258.pdf

Application of library-independent microbial source tracking methods for identifying the sources of faecal contamination in coastal areas
Provedor de dados: 5
Autores: Gourmelon, Michele; Caprais, Marie-paule; Le Mennec, Cecile; Mieszkin, Sophie; Ponthoreau, C.; Gendronneau, M.
Faecal contamination sources were identified in coastal areas around the Guerande-Atlantique peninsula using two microbial source tracking (MST) methods: (i) Bacteroidales host-specific 16S rRNA gene markers measured by real-time PCR and (ii) F-specific bacteriophage (FRNAPH) genotyping. Both methods were used on 63 water samples from 7 water courses. HF183 marker and bacteriophage genogroup II (FRNAPH II) were detected in all water samples and in the majority of water samples, respectively, from La Torre stream (W5), Piriac (W2), R2000 (W3) and Mazy (W7) rain water drains, and also detected, less frequently, in Le Nau drain (W4), suggesting contamination by human faecal sources at these sites. These human markers were weakly detected in Pouliguen channel...
Tipo: Text
Palavras-chave: Bacteroidales; F-specific RNA bacteriophages; Faecal bacterial indicators; Microbial source tracking; Water.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00003/11384/10304.pdf

Morphometric characteristics and seasonal proximity to water of the Cypriot bluntnosed viper Macrovipera lebetina lebetina (Linnaeus, 1758)
Provedor de dados: 80
Autores: Jestrzemski,Daniel; Kuzyakova,Irina.
Abstract  Background: The blunt-nosed viper Macrovipera lebetina (Linnaeus, 1758) is a medically important snake species in the Middle East. Its nominate subspecies Macrovipera l. lebetina is confined to Cyprus, where it is the only dangerously venomous snake species and heavily pursued. Despite the viper's large size, data on its body mass and sex-specific morphological differences are scarce. It is commonly believed that M. l. lebetina prefers freshwater proximity during summer. Hence, we aimed at investigating M. l. lebetina sex-specific morphological differences and its possible attraction to freshwater bodies in late summer.  Methods: Morphometric characteristics, proximity to water and conservation status of M. l. lebetina were investigated in Paphos...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cyprus; Blunt-nosed viper; Morphology; Body condition index; Ecology; Water; Snakebite; Conservation.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992018000100332

Microbiological analysis of water used in hydrotherapy
Provedor de dados: 80
Autores: Perestrelo,M. F.; Norberg,A. N.; Guerra-Sanches,F.; Torres,A. C.; Pile,E.
Water used in hydrotherapy units of Nova Iguaçu and Nilópolis, Rio de Janeiro State, Brazil, was microbiologically analyzed. Thirty samples (5ml each) were weekly collected from September 2001 to June 2002 before the beginning and after the end of activities in the units. For analysis, routine techniques were used, which showed the presence of Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Klebsiella spp, Candida spp, Penicillium spp, Epidermophyton spp, Aspergillus fumigatus, Aspergillus niger, Aspergillus spp, Cephalosporium spp, Cladosporium spp, Trichophyton rubrum, and Trichophyton spp. Results indicated a need for improving hygienic conditions, suggesting that water might be a contamination source in the evaluated units.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hydrotherapy; Water; Microorganisms; Bacteria; Fungi.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992006000300006

Spatially distributed control netowork for flow proportional chemical injection with center pivot irrigation
Provedor de dados: 18
Autores: King, B.A.; Wall, R.W.; Taberna, J.P, Jr.
Tipo: Article
Palavras-chave: Center pivot; Water.
Ano: 2009
URL: http://eprints.nwisrl.ars.usda.gov/1351/1/1328.pdf

Effect of timing of a deficit-irrigation allocation on corn evapotranspiration, yield, water use efficiency and dry mass
Provedor de dados: 18
Autores: Payero, J.O.; Tarkalson, D.D.; Irmak, S.; Davison, D.; Petersen, J.L.
Water regulations have decreased irrigation water supplies in Nebraska and some other areas of the USA  Great Plains. When available water is not enough to meet crop water requirements during the entire  growing cycle, it becomes critical to know the proper irrigation timing that would maximize yields and  profits. This study evaluated the effect of timing of a deficit-irrigation allocation (150 mm) on crop  evapotranspiration (ETc), yield, water use efficiency (WUE = yield/ETc), irrigation water use efficiency  (IWUE = yield/irrigation), and dry mass (DM) of corn (Zea mays L.) irrigated with subsurface drip  irrigation in the semiarid climate of North Platte, NE. During 2005 and 2006, a total of sixteen irrigation  treatments (eight each year) were...
Tipo: Article
Palavras-chave: Soil; Water; Drip irrigation.
Ano: 2009
URL: http://eprints.nwisrl.ars.usda.gov/1328/1/1305.pdf

Collector design for measuring high intensity time variant sprinkler application rates
Provedor de dados: 18
Autores: King, B.A.; Winward, T.W.; Bjorneberg, D.L.; Wall, R.W.
Peak water application rate in relation to soil water infiltration rate and soil surface storage capacity is important in the design of center pivot sprinkler irrigation systems for efficient irrigation and soil erosion control.  Measurement of application rates of center pivot irrigation systems has traditionally used tipping bucket rain gauges.  Calculation of application rate from tipping bucket rain gauge measurements restricts computed application rate to a discrete multiple of the rain gauge resolution and time interval.  This limits the resolution of application rate measurement, especially for time intervals less than 15 minutes.  A collector was designed to measure time variant high intensity sprinkler application rates under field conditions with...
Tipo: Article
Palavras-chave: Sprinkler irrigation; Soil; Water.
Ano: 2010
URL: http://eprints.nwisrl.ars.usda.gov/1565/1/1521.pdf

Impact of removing straw from wheat and barley fields: A literature review
Provedor de dados: 18
Autores: Tarkalson, D.D.; Brown, B.; Kok, H.; Bjorneberg, D.L.
The sustainability of straw removal from wheat and barley fields from the standpoint of  its effects on soil properties and nutrient cycling is a concern. A recent literature review  reveals that there is no negative effect of small grain straw removal on soil organic carbon  (SOC) content with irrigated conditions. With rainfed conditions, the results could be  more variable and depend on site productivity. Large amounts of nutrients are removed  when straw is removed, accelerating the rate of nutrient depletion and cost of replacing  these nutrients.
Tipo: Article
Palavras-chave: Soil; Water.
Ano: 2009
URL: http://eprints.nwisrl.ars.usda.gov/1335/1/1312.pdf

Soil water measurements relevant to agronomic and environmental functions of chemically treated soil
Provedor de dados: 18
Autores: Sojka, R.E.; Lehrsch, G.A.; Kostka, S.J.; Reed, J.L.; Koehn, A.C.; Foerster, J.A.
Tipo: Article
Palavras-chave: Nutrients; Soil; Water.
Ano: 2009
URL: http://eprints.nwisrl.ars.usda.gov/1349/1/1326.pdf

Polyacrylamide and biopolymer effects on flocculation, aggregate stability, and water seepage in a silt loam
Provedor de dados: 18
Autores: Lentz, R.D.
Researcher’s seek a more renewable and natural alternative for water soluble anionic polyacrylamide (PAM), a highly-effective, petroleum-derived polymer used in agriculture to control erosion and reduce water seepage from unlined irrigation structures. This study evaluated two anionic polymers: a bacteria-produced polysaccharide (biopolymer) with 10-20 Mg/mol molecular weight (MW) and 30% charge density, and a PAM (12-15 Mg/mol MW, 30% charge density) to compare their ability to flocculate soil colloids, stabilize soil aggregates, and influence effective hydraulic conductivity (seepage loss). The biopolymer most effectively flocculated the colloids at a concentration of 1 mg/L, but was still 30% less effective than PAM at 1 mg/L and 50% less effective than...
Tipo: Article
Palavras-chave: Water-soluble PAM (WSPAM); Erosion control; Erosion; Soil; Water.
Ano: 2015
URL: http://eprints.nwisrl.ars.usda.gov/1583/1/1539.pdf

Influence of soil properties and test conditions on sorption and desorption of testosterone
Provedor de dados: 18
Autores: Zhang, T.C.; Ma, Rui; Bartelt-Hunt, S.L.; Qi, Yong; Kranz, W.L.; Snow, D.D.; Mader, T.L.; Shapiro, C.A.; Shelton, D.P.; Van Donk, S.J.; Tarkalson, D.D.
In this study, batch sorption and desorption experiments were conducted for testosterone using four agricultural soils and five clay minerals. Significant differences in sorption behavior were observed between abiotic and biotic systems. The Freundlich sorption coefficient Kf (µg per g)/(µg per mL) ranged from 8.53 to 74.46 for soils and from 35.28 to 1243 for clays. The maximum sorption capacity (µg per g) of soils ranged from 25.25 to 440.61 for soils and 168.46 to 499.84 for clays. Correlation of sorption model parameters with soil properties indicated that both clay content and soil organic matter are important variables in predicting testosterone sorption behavior. Observed testosterone desorption from agricultural soils ranged from approximately 14...
Tipo: Article
Palavras-chave: Soil water (soil moisture); Soil; Water.
Ano: 2015
URL: http://eprints.nwisrl.ars.usda.gov/1606/1/1564.pdf

Water temperature in irrigation return flow from the Upper Snake Rock watershed
Provedor de dados: 18
Autores: Bjorneberg, D.L.
Water returning to a river from an irrigated watershed could increase the water temperature in the river. The objective of this study was to compare the temperature of irrigation return flow water with the temperature of the diverted irrigation water. Water temperature was measured weekly in the main irrigation canal, 24 return flow streams and one ephemeral stream from 2005 to 2008 in the Upper Snake Rock (USR) watershed. The USR is an 82,000 ha watershed in southern Idaho, USA with about 60% of the area surface irrigated and the remaining area sprinkler irrigated. Median annual water temperatures in irrigation return flow streams were not greater than the water diverted from the river, suggesting that water flowing through the canal system and furrow...
Tipo: Article
Palavras-chave: Drainage water (see Percolation water); Water.
Ano: 2015
URL: http://eprints.nwisrl.ars.usda.gov/1594/1/1552.pdf

The effectiveness of recovered magnesium phosphates as fertilizers in neutral and slightly alkaline soils
Provedor de dados: 18
Autores: Massey, M.S.; Davis, J; Ippolito, J.A.; Sheffield, R.E.
Magnesium phosphates such as struvite (MgNH4PO4x6H2O) can be recovered from municipal, industrial and agricultural wastewaters.  However, minimal research has been conducted on the beneficial reuse of these recovered products; conducted research has focused on low pH soils.  This study determined whether recovered struvite and dittmarite (MgNH4PO4xH2O) were effective P fertilizers in alkaline soils.  In addition to commercially available triple superphosphate (TSP) and certified organic rock phosphate (RP), recovered struvite, dittmarite, and a heterogeneous recovered phosphate were evaluated in a laboratory dissolution study and as fertilizers for spring wheat (Triticum aestivum L.) in a greenhouse study.  Struvite and dittmarite were much more soluble...
Tipo: Article
Palavras-chave: Chemistry; Fertility; Soil quality; Water.
Ano: 2009
URL: http://eprints.nwisrl.ars.usda.gov/1576/1/1532.pdf

Evaluation of neural network modeing to calculate well-watered leaf temperature of wine grape
Provedor de dados: 18
Autores: King, B.A.; Shellie, Krista.
Mild to moderate water stress is desirable in wine grape for controlling vine vigor and optimizing fruit yield and quality, but precision irrigation management is hindered by the lack of a reliable method to easily quantify and monitor vine water status. The crop water stress index (CWSI) that effectively monitors plant water status has not been widely adopted in wine grape because of the need to measure well-watered and non-transpiring leaf temperature under identical environmental conditions. In this study, a daily CWSI for the wine grape cultivar Syrah was calculated by estimating well-watered leaf temperature with an artificial neural network (NN) model and non-transpiring leaf temperature based on the cumulative probability of the measured difference...
Tipo: Conference or Workshop Item
Palavras-chave: Irrigation control; Water.
Ano: 2014
URL: http://eprints.nwisrl.ars.usda.gov/1582/1/1538.pdf

Removing soluble phosphorus in irrigation return flows with alum additions
Provedor de dados: 18
Autores: Leytem, A.B.; Bjorneberg, D.L.
Tipo: Article
Palavras-chave: Water; Phosphorous; Water quality.
Ano: 2005
URL: http://eprints.nwisrl.ars.usda.gov/1358/1/1335.pdf

Soil genesis and development, lesson 2: Weathering processes of rocks and minerals
Provedor de dados: 18
Autores: Mamo, M.; Kettler, T.; Ippolito, J.A.; Reuter, R.; McCallister, D.L.; Morner, P.; Soester, J,.
Tipo: Article
Palavras-chave: Soil; Water.
Ano: 2009
URL: http://eprints.nwisrl.ars.usda.gov/1342/1/1318%2D1322.pdf

Soil management and conservation: Irrigation: Methods
Provedor de dados: 18
Autores: Bjorneberg, D.L.
Irrigation applies water to soil to improve crop production. The three main methods of irrigation are surface, sprinkler and micro. Surface irrigation is used on 85% of the irrigated land in the world. It generally requires lower capital investment because the soil conveys water within the field, rather than pipes or tubing used for sprinkler or microirrigation. Water application is more controlled with sprinkler and microirrigation and these irrigation methods can be automated easier than surface irrigation. There are many variations of irrigation methods and types of irrigation equipment. The purpose of this article is to describe the irrigation methods primarily used for agricultural production.
Tipo: Article
Palavras-chave: Dryland crops; Irrigation control; Sprinkler irrigation; Soil; Water.
Ano: 2013
URL: http://eprints.nwisrl.ars.usda.gov/1568/1/1524.pdf

Surfactant effects on the water-stable aggregation of wettable soils from the continental USA
Provedor de dados: 18
Autores: Lehrsch, G.A.
Surfactants may affect soil structure differently depending upon the soil or the quality of rainfall or irrigation water. This study examined whether the water-stable aggregation of 11 wettable soils was affected by surfactants and the water in which the soils were sieved. The study also examined whether the wettable soils’ water drop penetration time (WDPT) was affected by surfactants, water drop quality, and elapsed time since the surfactants were applied. Two nonionic surfactants and a surfactant-free water control were sprayed (by misting) upon air-dry soil, then WDPT was measured 1 and 72 h thereafter. Subsequently, this treated soil was slowly wetted with an aerosol to its water content at a matric potential of 3 kPa, then immediately sieved for 600...
Tipo: Article
Palavras-chave: Water quality; Water.
Ano: 2013
URL: http://eprints.nwisrl.ars.usda.gov/1499/1/1462.pdf

Water treatment residuals and biosolids long-term co-applications effects to semi-arid grassland soils and vegetation
Provedor de dados: 18
Autores: Ippolito, J.A.; Barbarack, K.A.; Stromberger, M.E.; Paschke, M.W.; Brobst, R.B.
Tipo: Article
Palavras-chave: Grass forage; Water.
Ano: 2009
URL: http://eprints.nwisrl.ars.usda.gov/1348/1/1325.pdf

The characterization of microorganisms in dairy wastewater storage ponds
Provedor de dados: 18
Autores: Dungan, R.S.; Leytem, A.B.
Dairy wastewaters from storage ponds are commonly land applied to irrigate silage crops. Given that diverse microbial populations are associated with cattle feces, the objective of this study was to use a culture-independent approach to characterize Bacteria and Archaea in dairy wastewaters. Using domain-specific primers, a region of the 16S rRNA gene was amplified from pooled DNA extracts from 30 dairy wastewaters and subsequently used to create a clone library. A total of 152 bacterial clones were examined and sequence matches were affiliated with the following groups: Actinobacteria, Bacteroidetes, Firmicutes, Proteobacteria, and Synergistetes. Firmicutes was identified as the largest phylum representing up to 69% of the clone sequences. Of 167 clones...
Tipo: Article
Palavras-chave: Manure; Water.
Ano: 2013
URL: http://eprints.nwisrl.ars.usda.gov/1511/1/1475.pdf

Sprinkler Irrigation Effects on Infiltration and Near-Surface Unsaturated Hydraulic Conductivity
Provedor de dados: 18
Autores: Lehrsch, G.A.; Kincaid, D.C.
Sprinkler irrigation alters soil hydraulic properties both at and below the soil surface, yet its effects are not well characterized. We evaluated the effects of sprinkler irrigation on infiltration and near‐surface hydraulic conductivity (K) measured under tension in a poorly structured, recently roller‐harrowed Portneuf silt loam (Durinodic Xeric Haplocalcid). The experimental design was a randomized complete block with two treatments (pre‐ and post‐irrigation) and four replications. We used two half‐circle spray heads to apply 127 mm of water at 70 mm h-1 in one irrigation to duplicate 1 × 2 m plots. Unconfined (three‐dimensional) infiltration rates at steady‐state were measured at potentials of -55, -35, and -15mm of water before and about 10 days...
Tipo: Article
Palavras-chave: Infiltration; Sprinkler irrigation; Water.
Ano: 2010
URL: http://eprints.nwisrl.ars.usda.gov/1371/1/1354.pdf

Oilseed Radish Effects on Soil Structure and Soil Water Relations
Provedor de dados: 18
Autores: Lehrsch, G.A.; Gallian, J.J.
Oilseed radish (Raphanus sativus spp. oleifera) reduces sugarbeet cyst nematode (Heterodera schachtii) populations. Fall-incorporated radish biomass may also increase the yield and quality of subsequently grown sugarbeet (Beta vulgaris L.) by improving soil physical and hydraulic properties. This field study determined radish effects on nearsurface soil aggregate stability, water-stable aggregate size distribution, bulk density, and field-saturated water content, as well as infiltration and hydraulic conductivity measured at water supply potentials of ‑40, ‑20, and +0 mm H2O. In 2003 and 2004 in Twin Falls, ID, radish were grown in a Portneuf silt loam (Durinodic Xeric Haplocalcid) for about 10 weeks in the fall, then incorporated later that fall by...
Tipo: Article
Palavras-chave: Water management; Water.
Ano: 2010
URL: http://eprints.nwisrl.ars.usda.gov/1381/1/1357.pdf

Relations corrélatives entre les températures de l'eau aux stations hydrologiques de la Baie du lévrier et du Banc d'Arguin
Provedor de dados: 20
Autores: Bernikov, R.G.
Tipo: Journal Contribution
Palavras-chave: Temperature (air-sea); Hydrology; Water.
Ano: 1982
URL: http://hdl.handle.net/1834/4984

Preliminary investigations on the ichthyodiversity of Kilifi Creek, Kenya
Provedor de dados: 20
Autores: Oyugi, D.
In order to determine fish spatial variation, the Kilifi Creek was divided into three sampling zones: entrance, middle zone, and Creek end. Sampling was by both gill and cast nets. Hill’s diversity indices were used as a measure of spatial diversity variance. A total of 95 species from 45 families were recorded. Gerres filamentosus, Pomadasys multimaculatum, Leiognathus equula, and Terapon theraps occurred commonly. Highest species richness (No = 68) and diversity (N1 = 31.09) was recorded at the entrance and Creek middle respectively. Most of the species overlap with the highest overlap index (L = 2.52) recorded between Cynoglossus gilchristi and Scombroides lysan. The creek’s ichthyodiversity show considerable variability, with the high richness at the...
Tipo: Journal Contribution
Palavras-chave: Ichthyodiveristy; SCOMBROIDES LYSAN; CYNOGLOSSUS GILCHRISTI; TERAPON THERAPS; GERRES FILAMENTOSUS; POMADASYS MULTIMACULATUN; LEIOGNATHUS EQUULA; Sampling; Fish; Water; Sampling; Http://aims.fao.org/aos/agrovoc/c_6774.
Ano: 2005
URL: http://hdl.handle.net/1834/1127

Factibilidad de aplicación de una arcilla cubana para el enriquecimiento en minerales de agua potable
Provedor de dados: 20
Autores: Santa Cruz, L.; Castro, D.; Sardiñas, O.
Como parte del proyecto de implementación de la dieta macrobiótica en Cuba se valoró la situación de una arcilla italiana, empleada para enriquecer al agua potable con sales minerales, por una cubana similar (bentonita natural de Managua tipo 1). La caracterización minerológica, química y granulométrica de ambas arcillas fue similar. Se estudió el efecto de tres concentraciones de arcilla cubana en agua potable (0,1; 0,5 y 1 %) después de 24 h. Este tratamiento incrementó significativamente las concentraciones de sodio, magnesio y hierro y disminuyó las de calcio, cinc y cobre en el agua; todos los elementos cumplieron con las normas vigentes de agua potable.
Tipo: Journal Contribution
Palavras-chave: Clay minerals; Water; Minerals; Food; Diets; Drinking water.
Ano: 2008
URL: http://hdl.handle.net/1834/5013

Calidad fisico quimica de las aguas de las zonas de cautiverio y semicautiverio de los delfines
Provedor de dados: 20
Autores: Estévez, J. R.; Valcárcel, L.; Pupo, I.; Montero, A.; Frías, D.; Alberro, N.; López, D.; Simón, D.; Isaac, M. A.; Ramos, M.; Rivera, N.; Guevara, C.; Sánchez, L.; Cruz, D.; Blanco, M.; Sánchez, L.
Se determinó un grupo de parámetros físico-químicos de las aguas del Acuario Nacional de Cuba (ANC) y de la zona de semicautiverio donde están confinados los delfines, con el objetivo de evaluar la calidad de las mismas. Los valores obtenidos fueron siempre inferiores a los límites permisibles de acuerdo a la propuesta de norma por el ANC o a Normas internacionales.
Tipo: Journal Contribution
Palavras-chave: Quality; Water; Aquarium culture; Water; Quality; Http://aims.fao.org/aos/agrovoc/c_8309; Http://aims.fao.org/aos/agrovoc/c_6400.
Ano: 2005
URL: http://hdl.handle.net/1834/3100

Ecological and fisheries development of Lake Manzalah (Egypt):  hydrography and chemistry of Lake Manzalah
Provedor de dados: 20
Autores: Shakweer, L.
Lake Manzalah; the largest delta Lake in Egypt represents a dynamic system that has been undergoing continuous and pronounced changes since long times. In the last year’s this Lake faced drastic problems that retarded its environmental and fisheries development; the most serious one is the discharge of waste water. It is attempted in the present study to investigate the chemical characters of Lake Manzalah water during 2001-2002. Water temperature ranged from an average of 12.35oC in January and 29.14oC in July. Dissolved Oxygen, pH and total dissolved solids were found in ranges optimum for the living of marine and freshwater fish species. The average concentrations of nutrients lied in the following ranges: 1.24 to 4.89 μmol PO4 -3 l-1 , 5.08 to 28.73...
Tipo: Journal Contribution
Palavras-chave: Hydrography; Water; Chemistry Chemical composition Environments Water content Fisheries Chemical composition Water content Environment http://aims.fao.org/aos/agrovoc/c_1794 http://aims.fao.org/aos/agrovoc/c_15852 http://aims.fao.org/aos/agrovoc/c_2593.
Ano: 2005
URL: http://hdl.handle.net/1834/1250

Les conflits dans les pêches sénégalaise
Provedor de dados: 20
Autores: Bakhayokho, M.
Les conflits opposant les pêcheurs travaillant avec des engins fixes à ceux opérant avec des engins mobiles sur les mêmes zones de pêche ne sont pas rares au Sénégal. On peut citer le cas qui existe entre les pêcheurs artisants pratiquant le filet dormant ou le casier à seiche et les marins des chalutiers de la pêche industrielle.
Tipo: Book
Palavras-chave: Fish; Fish consumption; Ships; Saline water; Water; Fishery disputes; Fishery organizations; Ships; Fish; Water; Saline water; Http://aims.fao.org/aos/agrovoc/c_7040; Http://aims.fao.org/aos/agrovoc/c_15903; Http://aims.fao.org/aos/agrovoc/c_8309; Http://aims.fao.org/aos/agrovoc/c_16376.
Ano: 1990
URL: http://hdl.handle.net/1834/1694

Chickpea diseases resistance-screening techniques
Provedor de dados: 30
Autores: Y.L.
Palavras-chave: Chickpeas; Glucose; Distilling; Poultry equipment; Planting; Flours; Fungi; Disease resistance; Induced mutation; Water.
Ano: 1981
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4216

Variation in sensitivity to salinity in groundnut cultivars during seed germination and early seedling growth
Provedor de dados: 30
Autores: Singh,R.
Palavras-chave: Viruses; Groundnuts; Tolerance; Vegetative stage; Water; Genotypes; Seed testing; Protocols; Germinability; Irrigation water.
Ano: 2007
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3357

Vulnerable concentrations of birds in the North Sea
Provedor de dados: 27
Autores: Tasker, M.L.; Pienkowski, M.W.
Tipo: Info:eu-repo/semantics/book
Palavras-chave: Birds; Counting; North sea; Water.
Ano: 1987
URL: http://www.vliz.be/imisdocs/publications/261572.pdf

Observations on the feeding ecology of estuarine nematodes
Provedor de dados: 27
Autores: Moens, T.; Vincx, M.
Observations on living estuarine nematodes show that previous feeding type classifications do not accurately represent the trophic structure of an intertidal mudflat in the Westerschelde Estuary (Netherlands). A new scheme with six major nematode feeding guilds is proposed: (1) microvores; (2) ciliate feeders; and (3) deposit feeders sensu stricto are all nematodes without a distinct buccal armature. In the first two groups bacteria and protozoa, respectively are the major particulate food sources, while other items are included in the diet of the third. The three other categories are recognized among the nematodes with a buccal armature: (4) epigrowth feeders; (5) facultative predators; and (6) predators. Diatoms and other microalgae are an important...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biology; Biomass; Carbon; Habits; Habits; Meiobenthos; Water.
Ano: 1997
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7298

Assessment of ammonia toxicity in contaminated sediments in the upper Scheldt (Belgium): the development and application of toxicity identification evaluation procedures
Provedor de dados: 27
Autores: Van Sprang, P.; Janssen, C.R.; Sabayasachi, M.; Benijts, F.; Persoone, G.
The toxicity of sediment pore waters from 4 sites in the Upper Scheldt war characterized using modified Toxicity Identification Evaluation (TIE) procedures The samples from all locations exhibited acute toxicity to the freshwater crustacean Thamnocephalus platyurus. The IIE approach was conducted using an enlarged battery of fractionation tests. Toxicity was removed or reduced significantly by the cation exchange resins and the air-stripping test at pH 11. Additionally, increased toxicity war observed at higher pH while a reduced toxicity war found at a decreased pH. From these TIE studies, ammonia war identified as the dominant toxic agent.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Metals; River; Toxicants; Water.
Ano: 1996
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7459

Steltloper populaties en macrozoobenthos in een veranderend estuarium: de Oosterschelde (Nl.) = Wader populations and macrozoobenthos in a changing estuary: the Oosterschelde (The Netherlands)
Provedor de dados: 27
Autores: Meire, P.
Habitat verlies en degradatie is één van de belangrijke ecologische problemen van deze eeuw. Hoewel alle ecosystemen hieronder te lijden hebben, blijken wetlands of waterrijke gebieden, op wereldschaal vrij zeldzame gebieden, onder zeer zware antropogene druk te staan. Het is daarom ook niet te verwonderen dat deze ecosystemen sinds meerdere jaren een belangrijke prioriteit vormen voor het natuurbehoud. Binnen de wetlands vormen estuaria zeer produktieve systemen waarvan het rijke voedselaanbod wordt benut door grote aantallen steltlopers, die buiten het broedseizoen bijna volledig op dergelijke getijdengebieden zijn aangewezen. Het belang van het Deltagebied (NI.) en met name de getijdengebieden van Ooster- en Westerschelde voor watervogels worden kort...
Tipo: Info:eu-repo/semantics/doctoralThesis
Palavras-chave: Benthos; Birds; Estuaries; River; Water.
Ano: 1993
URL: http://www.vliz.be/imisdocs/publications/5961.pdf

Feeding biology of a predatory and a facultatively predatory nematode (&lt;i&gt;Enoploides longispiculosus&lt;/i&gt; and &lt;i&gt;Adoncholaimus fuscus&lt;/i&gt;)
Provedor de dados: 27
Autores: Moens, T.; Verbeeck, L.; Vincx, M.
This paper reports on the feeding biology of a predatory and of a facultatively predatory nematode, &lt;i&gt;Enoploides longispiculosus&lt;/i&gt; and &lt;i&gt;Adoncholaimus fuscus&lt;/i&gt;, respectively. Both species represent genera which are common and abundant in the littoral of the North Sea and in adjacent estuaries. Observations on the foraging behaviour of both species are given, and for the former species, a range of prey from its natural habitat is identified. Respiration was determined using a polarographic oxygen electrode technique and compared to consumption determined as predation rates on the monhysterid nematode &lt;i&gt;Diplolaimelloides meyli&lt;/i&gt;. The daily C-loss due to respiration accounted for 15% of the measured C-consumption...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carbon; Communities; Communities; Communities; Ecology; Flat; Food; Marine; Meiobenthos; Water.
Ano: 1999
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7336

Modelling the influence of ecological interactions on reactive transport processes in sediments
Provedor de dados: 27
Autores: Meysman, F.
Within the natural sciences, it has long been recognized that biological activity can modify the texture, structure and composition of surface sediments. Darwin (1881) already examined the stirring of soils by burrowing earthworms and made detailed observations on how these organisms affect soil processes. A similar phenomenon can be observed in aquatic sediments, which are inhabited by a diverse biological community, supported by the flux of organic matter and oxygen from the overlying water column. Surface sediments of oceans, estuaries, lakes and rivers are highly active biogeochemical environments and an effective way to generate insight in the complexity of the interactions is by means of so-called general early diagenetic models (e.g. Soetaert et al,...
Tipo: Info:eu-repo/semantics/doctoralThesis
Palavras-chave: Chemistry; Ecology; Hydrology; Model; Sediment; Water.
Ano: 2001
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=8063

Effect of man-made electromagnetic fields on common Brassicaceae Lepidium sativum (cress d'Alinois) seed germination: a preliminary replication study
Provedor de dados: 85
Autores: Cammaerts,MC; Johansson,O.
Under high levels of radiation (70-100 µW/m2 =175 mV/m), seeds of Brassicaceae Lepidium sativum (cress d'Alinois) never germinated. In fact, the first step of seeds' germination &amp;#8210; e.g. imbibitions of germinal cells &amp;#8210; could not occur under radiation, while inside the humid compost such imbibitions occurred and roots slightly developed. When removed from the electromagnetic field, seeds germinated normally. The radiation was, thus, most likely the cause of the non-occurrence of the seeds' imbibitions and germination.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Imbibitions; Seeds; Water; Wireless waves.
Ano: 2015
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572015000100019

Partitioning of Competition for Resources Between Soybean and Corn as Competitor Plant
Provedor de dados: 87
Autores: CARATTI,F.C.; LAMEGO,F.P.; SILVA,J.D.G.; GARCIA,J.R.; AGOSTINETTO,D.
ABSTRACT Plants compete for resources present below and above the soil surface. The objective of this work was to separate the individual effects of the competition for resources between soybean and corn as competitor plants. The experiment was conducted in a greenhouse, in 2014/2015. The treatments consisted of soybean cultivars (TEC 5718 and TEC 6029) in competition conditions with corn (no competition, competition for soil resources, competition for solar radiation and total competition). The variables evaluated were plant height at 7, 14, 21, 28, 35 and 42 days after emergence (DAE), stem/culm diameter, leaf area, shoot dry mass, root dry mass and the chlorophyll index, at 42 (DAE). The competition for soil resources between soybean and corn is...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Zea mays; Water; Competitiveness; Solar radiation; Competitor plant.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000400657

Impact of Water Supply Limitations from Federal Decisions in South Texas
Provedor de dados: 31
Autores: Robinson,   John R.C.; Michelsen,   Ari M.; Gollehon,   Noel R.
This study extends and refines a previous model and provides estimates of the economic value of water shortages from shortfalls in Mexican deliveries to the U.S. In the process, we identify and evaluate a range of crop choices, appropriate irrigation technology use, water source substitution, and other mitigation strategies used by farmers to deal with water shortages. The effects of exogenous crop price and yield risk, as well as and other structural considerations are incorporated in deriving the marginal value of irrigation water for reference drought years. Results show that South Texas farmers react to risk by diversifying their crop mix, which in turn has implications for the imputed value of water and soil resources. The derived shadow price of...
Tipo: Conference Paper or Presentation
Palavras-chave: Water; Irrigation; Rio Grande; Optimization; Resource /Energy Economics and Policy.
Ano: 2005
URL: http://purl.umn.edu/19464

Regulating Farmers: Lessons Learned from the Delmarva Peninsula
Provedor de dados: 31
Autores: Perez,   Michelle.
Tipo: Journal Article
Palavras-chave: Regulation; Agriculture; Policy; Water; State; Agricultural and Food Policy; Environmental Economics and Policy; Resource /Energy Economics and Policy; Q18; Q58.
Ano: 2011
URL: http://purl.umn.edu/117404

Water Trading within NSW Irrigation Industry: An Empirical Evaluation of Scale, Reasons and Attitudes
Provedor de dados: 31
Autores: Singh,   Inderpal; Bari,   Maksudul; Flavel,   Noel J.
The paper discusses the level of water trading within the NSW Irrigation Industry along with water prices, reasons, attitudes and knowledge of both permanent and temporary water trading. It is based on the results of a survey of 1,115 irrigators representing over 10% of the total irrigators' population within NSW Water Sharing Plans that commenced during 2004 and various secondary data sources covering water trading. Temporary water trading in Murray and Lower Murray Darling and Lachlan catchments has expanded since the commencement of the Water Sharing Plans in NSW. Nearly 7% and 40% of the irrigators surveyed participated in the permanent and temporary water markets respectively. Fifty six percent of the irrigators believed that temporary trading was...
Tipo: Conference Paper or Presentation
Palavras-chave: Water; Market; Irrigation Industry; Social and Economic Reasons; Scale of Trading; Water Sharing Plans and Attitudes; Land Economics/Use; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/6032

India Agricultural Policy Review
Provedor de dados: 31
Autores: Gilmour,   Brad; Gurung,   Rajendra Kumar.
With a population of about 1.1 billion, India is expected to overtake China as the world's most populous country by 2030. India's economy ranks as Asia's third largest, after Japan and China, and is now one of the world's fastest growing. While growth has led to significant reductions in poverty, India still ranks among the world's low income countries in terms of income per capita. Nevertheless, economic growth has resulted in a burgeoning middle-class.  India's agriculture sector accounts for 18% of GDP, and employs around 60% of the workforce. Rice, wheat, cotton, oilseeds, jute, tea, sugarcane, milk and potatoes are India's major agricultural commodities. With its growing urban middle-class and increasing influence in global affairs, India's policies...
Tipo: Report
Palavras-chave: India; Economic growth; Agricultural policy; Water scarcity; Market regulations; Agriculture; Water; Agricultural and Food Policy; Environmental Economics and Policy; Institutional and Behavioral Economics; Land Economics/Use; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/46456

Legal Pluralism and Dynamic Property Rights
Provedor de dados: 31
Autores: Meinzen-Dick,   Ruth Suseela; Pradhan,   Rajendra.
Conventional conceptions of property rights focus on static definitions of property rights, usually as defined in statutory law. However, in practice there is co-existence and interaction between multiple legal orders such as state, customary, religious, project and local laws, all of which provide bases for claiming property rights. Legal anthropological approaches that recognize this legal pluralism are helpful in understanding this complexity. Individuals may choose one or another of these legal frameworks as the basis for their claims on a resource, in a process referred to as “forum shopping.” Legal pluralism can create uncertainty especially in times of conflict because any individual is unlikely to have knowledge of all types of law that might be...
Tipo: Report
Palavras-chave: Property rights; Legal pluralism; Conflict; Law uncertainty; Natural resource management; Water; Water rights; Tenure; Resource /Energy Economics and Policy.
Ano: 2002
URL: http://purl.umn.edu/55442

ELASTICIDADE-RENDA DAS DESPESAS COM ÁGUA E ESGOTO NO MEIO URBANO E NO MEIO RURAL DAS REGIÕES BRASILEIRAS
Provedor de dados: 31
Autores: Leite,   Gil Bracarense; Maciel,   Marilia Fernandes; Santos,   Maurinho Luiz dos.
Este trabalho objetivou analisar as mudanças ocorridas na despesa com água e esgoto, em resposta à alteração na renda das famílias nas regiões Norte, Nordeste, Centro-Oeste, Sudeste e Sul. Para isso, estimou-se a elasticidade-renda da despesa por meio de um modelo econométrico que consiste em ajustar uma poligonal com três segmentos, com vistas em mostrar como a despesa com água e esgoto varia em decorrência de uma alteração no recebimento familiar. Os dados foram extraídos da Pesquisa de Orçamento Familiar de 2002/2003, realizada pelo IBGE. Os valores encontrados para elasticidade-renda situaram-se entre 0 e 1, o que indica que a água pode ser considerada um bem normal nas regiões analisadas e no Brasil, onde o valor encontrado foi de 0,4263. As...
Tipo: Conference Paper or Presentation
Palavras-chave: Água; Elasticidade-renda; Regiões brasileiras; Water; Elasticity-income; Brazilian regions; Consumer/Household Economics.
Ano: 2008
URL: http://purl.umn.edu/108072

Water and land in South Africa : economywide impacts of reform -- a case study for the Olifants river
Provedor de dados: 31
Autores: Mukherjee,   Natasha.
"July 1996." Includes bibliographical references (p. 37-41).
Tipo: Working or Discussion Paper
Palavras-chave: Equilibrium (Economics) -- Models; Computable general equilibrium (CGE); South Africa; Watershed management; Land use; Water; Resource /Energy Economics and Policy.
Ano: 1996
URL: http://purl.umn.edu/97763

CARACTERIZACIÓN DE LA PRODUCCIÓN DEL CULTIVO DE ALGODONERO (Gossypium hirsutum, L.) EN LA COMARCA LAGUNERA
Provedor de dados: 31
Autores: Wong,   Ricardo Miranda.
The cotton crop ( L.) has been cultivated in the Region Lagunera since more 150 years; however, the extension in the crop area has seen decreased considerable manner in the last years, due to several factors. This job investigated some of them, between that can to mention harvest area, water storage in the ditch availability, cotton seed area percentage with respect to the total area, international sale price cotton fiber, with the purpose to have one clearer idea about of industrial crop behavior.
Tipo: Journal Article
Palavras-chave: Cotton; Harvest; Water; Price; Fiber; Algodonero; Cosecha; Agua; Precio; Fibra.; Crop Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/45848

Comitês de Bacias Hidrográficas de rios do Médio São Francisco: possibilidades e desafios de gestão do uso da água
Provedor de dados: 31
Autores: Gomes,   Claudia Salgado; Reis,   Ricardo Pereira; Galizoni,   Flavia Maria; Ribeiro,   Eduardo Magalhaes.
O presente estudo tem como tema a gestão das águas, que se tornam cada vez mais escassas, o que acaba por desencadear conflitos entre os diferentes usuários. Diante dessa situação, essa pesquisa objetivou estudar os problemas e conflitos mais freqüentes relacionados à água nos rios do Médio São Francisco, em Minas Gerais, especificamente nos rios Verde Grande, Riachão e Jequitaí, verificando em quais situações essas questões culminam na formalização de Comitês de Bacias Hidrográficas e em que medida estes conseguem enfrentar tais questões. Foram identificados vários problemas que contribuem para a escassez de água nos rios pesquisados. Tais problemas, em sua maioria, são comuns aos três rios, com destaque para a derrubada de mata nativa. Os conflitos mais...
Tipo: Conference Paper or Presentation
Palavras-chave: Água; Conflitos; Comitê; Bacia hidrográfica; Water; Conflicts; Committee; Water basin; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/108139

Measuring Irrigation Water Efficiency with a Stochastic Production Frontier: An Application for Citrus Producing Farms in Tunisia
Provedor de dados: 31
Autores: Dhehibi,   Boubaker; Lachaal,   Lassaad; Elloumi,   Mohamed; Messaoud,   Emna B.
The objective of this paper is to propose an alternative measure of irrigation water efficiency based on the concept of input- specific technical efficiency, which contracts with measures previously used in the literature. The proposed methodology is applied to a randomly selected sample of 144 citrus growing farms located in Nabeul (Tunisia). A stochastic production frontier approach, based on Battese and Coelli’s (1995) inefficiency effect model, is used to obtain farm-specific estimates of technical and irrigation water efficiency. In addition, a second-stage regression approach is used to identify the factors influencing irrigation water efficiency differentials across citrus growing farms. Results indicate that technical efficiency ranges from a...
Tipo: Conference Paper or Presentation
Palavras-chave: Citrus; Efficiency; Tunisia; Water; Agricultural and Food Policy; Community/Rural/Urban Development; Demand and Price Analysis; Environmental Economics and Policy; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; International Relations/Trade; Marketing; Productivity Analysis; Research and Development/Tech Change/Emerging Technologies.
Ano: 2008
URL: http://purl.umn.edu/52166

MARGINAL PRICE OF LAKE RECREATION AND AESTHETICS: AN HEDONIC APPROACH
Provedor de dados: 31
Autores: Lansford,   Notie H., Jr.; Jones,   Lonnie L.
Efficient allocation of water requires knowledge of water's value in both consumptive and nonconsumptive uses. This study estimates the marginal value of water in lake recreational and aesthetic (RA) use. An hedonic price equation (employing the Box-Cox functional form) indicates lake front location, distance to lake, and scenic view are significant RA characteristics of housing. Water front properties command a premium price for the private access they offer. Beyond the water front, the marginal RA price falls rapidly with increasing distance, becoming asymptotic to some minimum. Twenty-two percent of housing price is found to be attributable to the RA component.
Tipo: Journal Article
Palavras-chave: Aesthetic; Box-Cox; Hedonic; Housing; Lake; Nonmarket; Recreation; Water; Resource /Energy Economics and Policy.
Ano: 1995
URL: http://purl.umn.edu/15347

Challenges and Opportunities for Water of the Rio Grande
Provedor de dados: 31
Autores: Rister,   M. Edward; Sturdivant,   Allen W.; Lacewell,   Ronald D.; Michelsen,   Ari M.
The Rio Grande has headwaters in Colorado, flows through New Mexico, and serves as the United States.–Mexico border in Texas, emptying into the Gulf of Mexico. Snow melt in Colorado and northern New Mexico constitutes the water river supply for New Mexico and the El Paso region, whereas summer monsoonal flow from the Rio Conchos in Mexico and tributaries, including the Pecos River, provides the Rio Grande flow for southern Texas. The region is mostly semiarid with frequent long-term drought periods but is also characterized by a substantial irrigated agriculture sector and a rapidly growing population. International treaties and interstate compacts provide the rules for allocation of Rio Grande waters between the United States and Mexico and among...
Tipo: Journal Article
Palavras-chave: Agriculture; Agricultural economics; Conservation; Irrigation; Natural resources; Renewable resources; Resources; Water; Resource /Energy Economics and Policy; Q5; Q15; Q20; Q25; Q28.
Ano: 2011
URL: http://purl.umn.edu/113529

The Waikato River Settlement and Natural Resource Management in New Zealand
Provedor de dados: 31
Autores: Steenstra,   Alex.
This paper examines the Waikato River Agreement in Principle by considering the implications of accommodating cultural values in natural resource management for the Waikato River and New Zealand. Economics will continue to play an integral part in the management of the Waikato River and natural resources in New Zealand. The settlement provides an opportunity to rethink how to incorporate Maori knowledge, cultural and social relationships, and social, cultural, and economic wellbeing in an integrated, holistic, and coordinated approach.
Tipo: Conference Paper or Presentation
Palavras-chave: Water; Cultural values; Natural resource economics; Co-management; Community/Rural/Urban Development; Environmental Economics and Policy; Land Economics/Use; Political Economy.
Ano: 2008
URL: http://purl.umn.edu/96665

Water, Women, and Local Social Organization in the Western Kenya Highlands
Provedor de dados: 31
Autores: Were,   Elizabeth; Swallow,   Brent M.; Roy,   Jessica.
Safe water is widely recognized as both a fundamental human need and a key input into economic activity. Across the developing world, the typical approach to addressing these needs is to segregate supplies of water for domestic use from water for large-scale agricultural production. In that arrangement, the goal of domestic water supply is to provide small amounts of clean safe water for direct consumption, cleaning, bathing and sanitation, while the goal of agricultural water supply is to provide large amounts of lower quality water for irrigated agriculture. A new third use of water is now being given more attention by researchers: small amounts of water employed in selected household enterprises. This third use may be particularly important for women....
Tipo: Working or Discussion Paper
Palavras-chave: Gender; Kenya; Water; Collective action; Community organization; Community-based organizations; Women; Labor and Human Capital.
Ano: 2006
URL: http://purl.umn.edu/42496

Public values for improved water security for domestic and environmental use
Provedor de dados: 31
Autores: Windle,   Jill; Rolfe,   John; Brouwer,   Roy.
Metrics for evaluating environmental trade-offs can be developed with varying levels of consistency across case study sites. A key issue is whether standard evaluation experiments can be conducted over multiple sites, or whether experiments have to be tailored to each case study application. To test how useful a consistent approach is, choice modelling (CM) has been used in a number of countries. Choice modelling assess the trade-offs households are prepared to make between water use restrictions, maintaining environmental conditions in waterways, and increased water costs.   This research paper reports the results of the Queensland survey. The results show that it is not possible to downplay case study framing issues and that it is not appropriate to...
Tipo: Report
Palavras-chave: Choice modelling; Water; Environment; Framing; Environmental Economics and Policy; Resource /Energy Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/94818

Estimating Economic Health Costs of Not Controlling Toxic Water Pollution
Provedor de dados: 31
Autores: Easter,   K. William; Konishi,   Yoshifumi.
The purpose of this paper is to determine what types of information may be important in determining the welfare benefits of preventing toxic water contamination when a given type of toxification occurs (or is likely to occur) in a given setting. It attempts to identify information and behavior issues that need to be considered when policy makers and others wish to obtain reasonable estimates of welfare benefits and weigh them against the economic costs of removing toxins. This paper also provides reasonable "scenarios" for three toxic pollutants that are found in water bodies (surface water or groundwater). We make use of two country alternatives--one in developing countries and the other in developed countries--to demonstrate, with specific examples of...
Tipo: Conference Paper or Presentation
Palavras-chave: Welfare costs; Arsenic; Mercury; Atrazine; Information; Water; Environmental Economics and Policy; Health Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/25768

An Overview of the Canadian Agriculture and Agri-Food System 2009
Provedor de dados: 31
This 2009 report provides an economic overview of the Canadian agriculture and agri-food system.  It is meant to be a multi-purpose reference document to provide:  an introduction to the agriculture and agri-food system;  a snapshot of structural changes that are occurring throughout the system in response to various factors; and  background data and information to inform public discussions on challenges and opportunities facing the Canadian agriculture and agri-food system.  Charts and tables with brief accompanying texts are used to summarize information and to provide base performance indicators.  The 2009 report begins with a special feature which describes indicators to benchmark competitiveness of the Canadian agriculture and agri-food sector at the...
Tipo: Report
Palavras-chave: Agri-food; Competitiveness; Consumers; GDP; Employment; Exports; Imports; Innovation; Inflation; Farm typology; Income; Government support; Program payments; Profitability; Processing; Concentration; Water; Agribusiness; Agricultural and Food Policy; Agricultural Finance; Consumer/Household Economics; Crop Production/Industries; Demand and Price Analysis; Environmental Economics and Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; International Relations/Trade; Labor and Human Capital; Land Economics/Use; Livestock Production/Industries; Marketing; Production Economics; Productivity Analysis; Public Economics; Research and Development/Tech Change/Emerging Technologies; Resource /Energy Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/59885

Agricultural Trade and Freshwater Resources
Provedor de dados: 31
Autores: Reimer,   Jeffrey J.
Approximately 75% of all water used by humans goes towards food production, much of which is traded internationally.  This study formally models how this works in the case of crop agriculture, making use of recent advances in international trade theory and new data on the productivity by which countries use water for crop agriculture.  The strength of the model lies in its ability to predict, when there is a shock to the system, how trade between pairs of specific countries changes for products that use water intensively.  In one application of the model, international trade in final products is shown to be a means for countries to deal with short- and long-run shocks to water resources that are too big for one country to handle by itself in isolation.  In...
Tipo: Presentation
Palavras-chave: Climate change; Simulation; Trade liberalization; Water; Agricultural and Food Policy; Crop Production/Industries; International Development; International Relations/Trade; Resource /Energy Economics and Policy; F11; F18; Q25; Q54.
Ano: 2012
URL: http://purl.umn.edu/123944

Seawater Desalination for Municipal Water Production
Provedor de dados: 31
Autores: Leidner,   Andrew J.; Lacewell,   Ronald D.; Rister,   M. Edward; Woodard,   Joshua D.; Sturdivant,   Allen W.; White,   Jacob M.
This paper examines the optimal allocation of several inputs in the context of seawater desalination by reverse osmosis (RO) as a source of municipal (or commercial or industrial) water.  A cost-minimization model is developed, a production function is estimated, and sensitivity analyses are conducted using the optimization model to investigate the effect of environmental conditions and economic factors on the optimal input portfolio and the cost of operating a modeled seawater desalination facility.  The objectives of this paper are to better understand the effect on the seawater desalination facility’s costs and input portfolio from changes in water quality, membrane lifespan, daily operations schedule, and energy prices.  Findings include that lower...
Tipo: Conference Paper or Presentation
Palavras-chave: Water; Production; Seawater desalination; Resource /Energy Economics and Policy.
Ano: 2011
URL: http://purl.umn.edu/98827

Private Sector Participation in the Water and Wastewater Services Industry
Provedor de dados: 31
Autores: Baumert,   Jennifer; Bloodgood,   Laura.
Countries introduce private sector participation into the water and wastewater utilities sector for a number of reasons. The introduction of a profit motive may increase efficiency as compared to public management of the water system, and private firms have been noted for customer service improvements. Financial considerations, including revenues from the sale of assets and reductions in the direct cost of providing water services, may also motivate governments to introduce private sector participation in this industry. However, because water is a basic human necessity, the introduction of private participation in this industry sector may raise social, economic, and national security concerns. Private participation in the global water and wastewater...
Tipo: Working or Discussion Paper
Palavras-chave: Water; Wastewater; Environmental services; Private sector participation; Public Economics.
Ano: 2004
URL: http://purl.umn.edu/15876

Water Saving Technology in Chinese Rice Production - Evidence from Survey Data
Provedor de dados: 31
Autores: Abdulai,   Awudu; Glauben,   Thomas; Herzfeld,   Thomas; Zhou,   Shudong.
Whereas water is an important input in rice production, China faces severe problems with increasing demand for water and limited water resources. In conventional paddy production, one of the most important irrigated crops, a significant amount of irrigation water is lost due to percolation and evaporation. Therefore, it exist a vivid research in water saving rice technologies. This paper analyzes the adoption of one of these water-saving rice production technologies, the so-called Ground Cover Rice Production System (GCRPS), in the Hubei province. Based on farm survey data several factors which affect the adoption decision could be identified. The adoption decision is treated as a binary choice problem and therefore a probit model is used for the...
Tipo: Conference Paper or Presentation
Palavras-chave: China; Technology adoption; Water; GCRPS; Probit; Crop Production/Industries; O30; Q16.
Ano: 2005
URL: http://purl.umn.edu/24708

Impacts of considering climate variability on investment decisions in Ethiopia
Provedor de dados: 31
Autores: Block,   Paul J.; Strzepek,   Kenneth M.; Rosegrant,   Mark W.; Diao,   Xinshen.
Extreme interannual variability of precipitation within Ethiopia is not uncommon, inducing droughts or floods and often creating serious repercussions on agricultural and non-agricultural commodities. An agro-economic model, including mean climate variables, was developed to assess irrigation and road construction investment strategies in comparison to a baseline scenario over a 12-year time horizon. The motivation for this work is to evaluate whether the inclusion of climate variability in the model has a significant effect on prospective investment strategies and the resulting country-wide economy. The mean climate model is transformed into a variable climate model by dynamically adding yearly climate-yield factors, which influence agricultural...
Tipo: Report
Palavras-chave: Climate variability; Climate change; Water; Droughts; Flooding; Irrigation; Economic aspects; Road construction; Investments; Economic situation; Agro-economic model; Food and water security; Environmental Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/55419

ALTERNATIVAS PARA A GERAÇÃO DE ENERGIA RENOVÁVEL NO BRASIL: A OPÇÃO PELA BIOMASSA
Provedor de dados: 31
Autores: Marconato,   Mariane Silva; Santini,   Giuliana Aparecida.
Durante muito tempo, os recursos fósseis e hídricos foram os grandes propulsores da civilização e da economia. O Brasil também se apoiou nessas fontes energéticas para o desenvolvimento de atividades industriais, agrícolas, de serviços e da própria sociedade. Entretanto, vive-se hoje uma crise no abastecimento energético, em função da problemática geopolítica, econômica e ambiental em torno da extração e comercialização desses recursos, uma vez que possuem ainda, caráter não renovável, portanto, finito na natureza. Os escassos investimentos governamentais e a abertura econômica do setor energético resultou no fim do monopólio energético, o que favoreceu a implantação de sistemas alternativos, na maioria, advindos da biomassa. Dentre esses, destaca-se a...
Tipo: Conference Paper or Presentation
Palavras-chave: Energia; Fóssil; Hídrico; Renovável; Biomassa; Energy; Fossil; Water; Renewable; Biomass; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/112629

Collective Action for Water Harvesting Irrigation in Lerma-Chapala Basin, Mexico
Provedor de dados: 31
Autores: Scott,   Christopher A.; Silva-Ochoa,   Paula.
Water and watersheds are difficult to separate for management purposes. Providing irrigation as a supplement to rainfall for crop production requires considerable collective action at the watershed level to mobilize labor and other resources, as well as to make decisions and implement the distribution of benefits. Small- scale water harvesting irrigation systems in Mexico have endured for centuries. They now face considerable challenges with changes in the ejido property rights over land and water, the growing importance of alternative sources of livelihoods, and increasing scarcity and competition for water within the river basins. Two case studies of water harvesting irrigation systems in the Lerma-Chapala Basin illustrate the response of communities to...
Tipo: Working or Discussion Paper
Palavras-chave: Irrigation; Watershed; Water harvesting; Water; Collective action; Property rights; Mexico; Resource /Energy Economics and Policy.
Ano: 2001
URL: http://purl.umn.edu/50057

Devolution and Accountability Effects in the Public Provision of Water Services in Indonesia
Provedor de dados: 31
Autores: Meirelles,   Patricia; Rodriguez,   Catherine.
This paper separately evaluates how devolution and accountability, two distinct aspects of the decentralization reforms implemented in Indonesia in the year 2001, influenced the public provision of water services. Using household level data it is found that the devolution of responsibility does not necessarily affect the provision of public services. Our findings show that the quality of publicly provided water decreased only in cities in which devolution was accompanied by a change in accountability. Robustness checks suggest that these results are driven by changes in the accountability framework rather than trends in the health services.
Tipo: Working or Discussion Paper
Palavras-chave: Indonesia; Decentralization; Accountability; Devolution; Water; Resource /Energy Economics and Policy; O2; I18; H2; H54.
Ano: 2010
URL: http://purl.umn.edu/107395

Agricultura familiar, água e estratégias produtivas no rio dos Cochos, campos gerais de Minas
Provedor de dados: 31
Autores: Galizoni,   Flavia Maria; Ribeiro,   Eduardo Magalhaes; Lopes,   Elias Carlos; Chiodi,   Rafael Eduardo; Reis,   Ricardo Pereira.
O Alto-Médio São Francisco, inserido no bioma caatinga, está localizado na porção norte do estado de Minas, região semi-árida, marcada por uma distribuição muito irregular das chuvas no correr do ano. Esta região é alvo de projetos de irrigação, interessados principalmente nas águas do São Francisco, e na de seus principais afluentes. O objetivo deste artigo é analisar a relação entre comunidades de lavradores e água em um meio onde existe grande sazonalidade na disponibilidade natural de recursos hídricos e, ao mesmo tempo, incentivos maciços para projetos intensivos em uso de água. Procura analisar, principalmente, os manejos comunitários das águas realizados por agricultores familiares, a relação entre disponibilidade de água, produção de alimentos e...
Tipo: Conference Paper or Presentation
Palavras-chave: Semi-árido; Agricultura familiar; Água; Semiarid; Family farmer; Water; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/106123

Biological Control of Giant Reed (Arundo donax): Economic Aspects
Provedor de dados: 31
Autores: Seawright,   Emily K.; Rister,   M. Edward; Lacewell,   Ronald D.; Sturdivant,   Allen W.; Goolsby,   John A.; McCorkle,   Dean A.
Arundo donax is a large, invasive weed consuming large quantities of water in the riparian area of the Texas Rio Grande Basin.  With water availability a concern to the area, the USDA-ARS is investigating biological control agents to increase available water, creating a benefit to both the region’s economy and society in general.
Tipo: Conference Paper or Presentation
Palavras-chave: Arundo donax; Giant Reed; Water; Economics; Invasive; Environmental Economics and Policy; Resource /Energy Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/46740

Agricultural Water Security and Instream Flows for Endangered Salmonids in Coastal California's Watersheds
Provedor de dados: 31
Autores: Mezzatesta,   Mariano; Newburn,   David A.; Brozovic,   Nicholas.
Many rural landowners within the Western United States do not have access to a secure water supply provided by a major dam or an irrigation district. Such water users must rely instead on groundwater pumping and/or seasonal water flows from tributaries. Some of these agricultural producers choose to store winter stream flows from tributaries within onsite reservoirs to secure their spring/summer water needs. However, regulatory agencies have increased restrictions on surface water storage and diversions to improve instream flows for endangered salmon, thus reducing water security for many landowners not located along the main stem.  The majority of salmon habitat is within the tributaries located throughout a watershed. Most research regarding instream...
Tipo: Conference Paper or Presentation
Palavras-chave: Instream flow; Salmon; Endangered species; Water; Watershed; Environmental Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/61485

Are Two Economic Instruments Better Than One? Combining Taxes and Quotas under Political Lobbying
Provedor de dados: 31
Autores: Finkelshtain,   Israel; Kan,   Iddo; Kislev,   Yoav.
Direct commands, market based, or combined, whichever is the government's mean of intervention, is expected to raise political lobbying and pressure. This study offers a political-economic model of an industry, which is regulated by an integrated system of both direct and market based policies. The model is used for a normative theoretical analysis and as a basis for a structural econometric framework. Exploiting a unique data set that describes the regulations of irrigation water in Israel during the mid eighties by means of quotas and prices, the political and technological parameters of the model are structurally estimated and used to assess the relative efficiency of quotas, prices and integrated regulation regimes.
Tipo: Working or Discussion Paper
Palavras-chave: Political Economy; Natural Resources; Water; Political Economy; D72.
Ano: 2010
URL: http://purl.umn.edu/93133

Influence of Climate Variability on the Market Price of Water in the Gila-San Francisco Basin
Provedor de dados: 31
Autores: Pullen,   Jennifer L.; Colby,   Bonnie G.
Emerging water markets in the western United States have slowly developed as usage patterns have changed over time.  This article develops an econometric model for the Gila-San Francisco Basin.  Results indicate the market price of water has risen in response to drought and market conditions.  Analysis shows a statistically significant relationship between the price and quantity of water transferred, year the transaction occurred, location where the transaction occurred, new use of the water right, and whether the transaction occurred during a drought year.  Using the Standard Precipitation Index, we find negotiated prices are higher during dry years.
Tipo: Journal Article
Palavras-chave: Drought; Econometrics; Hedonic; Market price; Palmer Hydrological Drought Index; Standard Precipitation Index; Water; Western United States; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/46568

An Optimal Control Framework to Address the Relationship between Water Resource Management and Water-Borne Health Impacts:  Focus on the Texas Lower Rio Grande Valley
Provedor de dados: 31
Autores: Leidner,   Andrew J.; Lacewell,   Ronald D.; Rister,   M. Edward; Sturdivant,   Allen W.
The objective of this study is develop a theoretical model that can evaluate two types of public health expenditures on water-borne health risks: water-related municipal services, an ex ante preventative measure against water-borne contamination, and medical treatment, an ex post treatment of the water-borne pollutant’s harmful effects on human health.  The modeled community can allocate resources in either centralized-municipal water-services, point-of-use water-services, or medical intervention, with expenditures subject to a budget constraint.  The movement of a water-borne illness through the community is modeled with a susceptible-infected-susceptible (SIS) disease framework.  An optimization framework is developed, including a statement of the...
Tipo: Conference Paper or Presentation
Palavras-chave: Water; Public health; Rural development; Dynamic optimization; Community/Rural/Urban Development; Resource /Energy Economics and Policy.
Ano: 2011
URL: http://purl.umn.edu/98806

Structure and Power in Multilateral Negotiations: An Application to French Water Policy
Provedor de dados: 31
Autores: Simon,   Leo K.; Goodhue,   Rachael E.; Rausser,   Gordon C.; Thoyer,   Sophie; Morardet,   Sylvie; Rio,   Patrick.
Stakeholder negotiation is an increasingly important policymaking tool. However, relatively little is understood about the relationship between the structure of the negotiating process and the effectiveness with which stakeholders can pursue their individual interests. We apply the Rausser- Simon multilateral bargaining model to a specific negotiation process involving water storage capacity and use in the upper Adour Basin in southwestern France. We focus on a coalition of three stakeholder groups with aligned but distinct interests. In addition to the standard indices of bargaining power—the distribution of political weights (“access”) and players’ utilities if an agreement is not reached, our analysis identifies other less obvious sources of power....
Tipo: Book
Palavras-chave: Water; Bargaining; Negotiations; Environmental Economics and Policy; Institutional and Behavioral Economics.
Ano: 2007
URL: http://purl.umn.edu/37630

Establecimiento de un precio optimo ambiental y social para el agua de riego mediante la internalizacion de los costes ambientales y el uso de matrices de contabilidad social...
Provedor de dados: 31
Autores: Elorrieta,   Jose Ignacio; Castellano,   E.; de Anguita,   P. Martinez; Pellitero,   M.; Rey,   Concepcion.
RESUMEN: Se propone una metodología para obtener un "precio social y ambiental óptimo" que pueda aplicarse al agua de riego en la Comunidad Foral de Navarra (CFN) de modo que maximice la internalización de los costes ambientales asociados al consumo no contemplados en el actual precio sin que el nivel general de la economía regional se resienta. Para ello se elabora un modelo económico sobre un Sistema de Información Geográfica (SIG) que permite cuantificar y valorar los costes ambientales en cada una de las subcuencas de la Comunidad. Para valorar íntegramente el agua, los elementos que se tienen en cuenta son: volumen, calidad y riesgo de afectar a los ecosistemas acuáticos y de ribera.  Estos valores son estimados mediante métodos de valoración...
Tipo: Journal Article
Palavras-chave: Water; Social optimal price; GIS; Social Accounting Matrix (SAM); Externalities; Q25; Q14.
Ano: 2003
URL: http://purl.umn.edu/28745

New Institutional Economics, Governance and the Performance of Water Institutions in India
Provedor de dados: 31
Autores: Gandhi,   Vasant P.; Crase,   Lin.
There has been substantial water resources development for agriculture in India but the emphasis has been mainly on the technical side - the building of the necessary institutions required for effective management of the resource has received little attention. Many believe that water resource management in India is heading for a crisis unless the institutions and related policies are rapidly transformed. In this light, the study examines key features of water institutions in India, applying new institutional economics fundamentals, as well as management theories of good governance. The study uses a survey of 29 water institutions and 450 farm households conducted across three states in India which face water scarcity and have attempted to address it...
Tipo: Conference Paper or Presentation
Palavras-chave: Water; Institutional Economics; Resource Economics and Policy; Agricultural and Food Policy; Institutional and Behavioral Economics; Resource /Energy Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/51415

Structuring Exotic Options Contracts on Water to Improve the Efficiency of Resource Allocation in the Water Spot Market
Provedor de dados: 31
Autores: Williamson,   Brendon; Villano,   Renato A.; Fleming,   Euan M.
With the current drought in South-Eastern Australia highlighting the scarcity and value of inland Australia’s water resources, focus turns to how these resources can be allocated more efficiently. The first major step was taken almost a decade ago with the separation of land and water property rights allowing openly traded water markets. This study assesses the potential economic benefits that options contracts bring to the water market in the Murray Valley water market. Exotic call options are estimated using both Black-Scholes and skewness-and-kurtosis-amended Black-Scholes financial option pricing methods that are based on three years of data on water prices. While the presence of options would result in significant economic benefits in the more...
Tipo: Conference Paper or Presentation
Palavras-chave: Options; Skewness-and-kurtosis-amended Black-Scholes model; Water; Environmental Economics and Policy; Financial Economics; Research Methods/ Statistical Methods; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/5992

Incentives for Residential Water Conservation: Water Price, Revenue, and Consumer Equity in Florida
Provedor de dados: 31
Autores: Rawls,   Colin; Borisova,   Tatiana; Berg,   Sanford; Burkhardt,   Jeffrey.
Economic theory suggests that price incentives can be used to encourage water conservation in residential consumers.  Conservation water rates are designed to send price signals that encourage households to reduce discretionary water use in the long term. However, it is not always clear that conservation rates effectively provide meaningful incentives. Utilities themselves may also not have strong incentives to implement conservation rates. If conservation rates have a negative impact on revenue, or if they lead to increased revenue variability, utilities may have a disincentive to use them.  In addition, block pricing structures (where unit water rate increases with water usage) may be inequitable, in the sense that the “revenue burden” is borne...
Tipo: Conference Paper or Presentation
Palavras-chave: Conservation; Water; Price; Revenue; Equity; Community/Rural/Urban Development; Consumer/Household Economics; Demand and Price Analysis; Environmental Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/56510

INVESTIGATING THE ECONOMIC AND WATER QUALITY EFFECTS OF THE 2003 CAP REFORM ON ARABLE CROPPING SYSTEMS: A SCOTTISH CASE STUDY
Provedor de dados: 31
Autores: Mouratiadou,   Ioanna; Russell,   Graham; Topp,   Cairistiona; Louhichi,   Kamel.
The 2003 Common Agricultural Policy Reform aimed to promote the socio-economic and environmental sustainability of agricultural systems. An important question is how far the Reform has indeed encouraged farmers to contribute to achieving broad economic and environmental goals. The economic and water resource effects of the Reform have been explored for the case study area of the Lunan catchment, which is typical of Scottish arable cropping areas. Land use data analysis, bio-physical modelling and bio-economic modelling were used in combination to identify the effects of a range of scenarios. The results indicate only small changes in the cropping pattern and associated economic and water quality indicators as a result of the Reform, with the main changes...
Tipo: Conference Paper or Presentation
Palavras-chave: Common Agricultural Policy; Bio-economic modelling; Water; Land use; Scotland.; Agricultural and Food Policy; Research Methods/ Statistical Methods; Q10; Q18; Q25.
Ano: 2008
URL: http://purl.umn.edu/44797

THE POLITICAL ECONOMY OF THE HUMAN RIGHT TO WATER
Provedor de dados: 31
Autores: Branco,   Manuel Couret; Henriques,   Pedro Damiao de Sousa.
A água é essencial à sobrevivência humana. Uma economia política humanizada, isto é dirigida para a satisfação das necessidades básicas, deve preocupar-se com a questão da disponibilidade e distribuição de água. No que diz respeito à satisfação das necessidades básicas, podemos afirmar que é relativamente fácil e barato fornecer água para todos. Porque razão, então existe uma desigualdade na distribuição? Esta desigualdade representa uma violação séria de um direito humano, como será desenvolvido à frente, e não deverá ser tolerada. Este artigo trata do papel que a economia desempenha no desigual exercício do direito humano de acesso à água potável.  Este artigo examina como o discurso da economia dominante pode entrar em conflito com os direitos humanos...
Tipo: Conference Paper or Presentation
Palavras-chave: Human rights; Water; Market; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/108631

Water rights for variable supplies
Provedor de dados: 31
Autores: Freebairn,   John W.; Quiggin,   John C.
The relative merits of different systems of property rights to allocate water among different extractive uses are evaluated for the case where variability of supply is important. Three systems of property rights are considered. In the first, variable supply is dealt with through the use of water entitlements defined as shares of the total quantity available. In the second, there are two types of water entitlements, one for water with a high security of supply and the other a lower security right for the residual supply. The third is a system of entitlements specified as state-contingent claims. With zero transaction costs, all systems are efficient. In the realistic situation where transaction costs matter, the system based on state-contingent claims is...
Tipo: Journal Article
Palavras-chave: Property rights; State-contingent claims; Water; Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/116968

Latin American Agricultural Trade: The Role of the WTO in Sustainable Virtual Water Flows
Provedor de dados: 31
Autores: Niemeyer,   Insa; Garrido,   Alberto.
International agricultural trade has been growing significantly during the last decade. Many countries rely on imports to ensure adequate food supplies to the people. A few are becoming food baskets of the world. This process raises issues about the food security in depending countries and potentially unsustainable land and water use in exporting countries. In this paper, we analyse the impacts of amplified farm trade on natural resources, especially water. Farm exports and imports of five Latin America countries (Brazil, Argentina, Mexico, Peru and Chile) are examined carefully. A preliminary analysis indicates that virtual water imports can save valuable water resources in water-short countries, such as Mexico and Chile. Major exporting countries,...
Tipo: Conference Paper or Presentation
Palavras-chave: Farm trade; Water; Blue water; Green water; Global sustainability; Food production; Global food demand; Water pricing; WTO; International Relations/Trade; Resource /Energy Economics and Policy.
Ano: 2011
URL: http://purl.umn.edu/114615

Experimental Economics and Water Policy
Provedor de dados: 31
Autores: Duke,   Charlotte.
Experiments in economics and their application to policy design continue to gain increasing popular appeal. Australia is investing in training, capacity building and international partnerships to bring these skills to our policy makers. Economic experiments are used to test policy-related hypotheses: to examine the behavioural processes upon which the policy is built, identify policy bugs, confirm incentive mechanism performance, investigate new decision processes, and illustrate economic allocation systems to stakeholders. Experiments provide a new source of information to improve policy design.  This paper explores a set of experiments conducted for the National Action Plan for Salinity and Water Quality Market Based Instruments Pilots Program. The...
Tipo: Conference Paper or Presentation
Palavras-chave: Policy Experiments; Market mechanisms for the environment; Water; Resource /Energy Economics and Policy; Q25; Q28; C90.
Ano: 2006
URL: http://purl.umn.edu/25369

An Overview of the Canadian Agriculture and Agri-Food System
Provedor de dados: 31
This 2008 report provides an economic overview of the Canadian agriculture and agri-food system.  It is meant to be a multi-purpose reference document to provide:  an introduction to the agriculture and agri-food system;  a snapshot of structural changes that are occurring throughout the system in response to various factors; and  background data and information to inform public discussions on challenges and opportunities facing the Canadian agriculture and agri-food system.  The 2008 report begins with a special feature describing recent developments in global commodity markets when prices rose dramatically over the past year. It continues by reviewing each segment of the system, going upstream from consumers to food distribution, food, beverage and...
Tipo: Report
Palavras-chave: Agriculture; Agri-food; Gross Domestic Product; GDP; Employment; Exports; Imports; Innovation; Inflation; Farm typology; Farm income; Government support; Program payments; Profitability; Processing; Concentration; Water; Agribusiness; Agricultural and Food Policy; Agricultural Finance; Consumer/Household Economics; Demand and Price Analysis; Environmental Economics and Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; International Relations/Trade; Labor and Human Capital; Land Economics/Use; Livestock Production/Industries; Marketing; Production Economics; Productivity Analysis; Public Economics; Research and Development/Tech Change/Emerging Technologies; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/46805

WATER, ENERGY, AND AGRICULTURAL POLICY LINKAGES: THE CASE OF COTTON IN CENTRAL ASIA
Provedor de dados: 31
Autores: Motamed,   Mesbah J.; Arriola,   Christine; Hansen,   James M.; MacDonald,   Stephen.
This paper examines the impacts of different irrigation scenarios on Uzbekistan's cotton sector and world cotton trade. The immediate challenges for this region's water resource management represent a test case for the long-run challenges associated with global climate change. With an eye towards this eventuality, this paper describes a variety of water policy scenarios relevant to Central Asia's agriculture and simulates their impacts on cotton markets in this region and around the world.
Tipo: Conference Paper or Presentation
Palavras-chave: Water; Cotton; Agricultural trade; Central Asia; Agricultural and Food Policy; Crop Production/Industries; Environmental Economics and Policy; International Relations/Trade; Land Economics/Use; Resource /Energy Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/91400

Impacts of Biofuels on Water Supply: Proposed Cures May Worsen the Disease
Provedor de dados: 31
Autores: Huffaker,   Ray G.
Tipo: Journal Article
Palavras-chave: Water; Conservation; Biofuels; Irrigation; Resource /Energy Economics and Policy; Q25; Q48.
Ano: 2010
URL: http://purl.umn.edu/95758

Two-Part Tariffs versus Linear Pricing Between Manufacturers and Retailers: Empirical Tests on Differentiated Products Markets
Provedor de dados: 31
Autores: Bonnet,   Céline; Dubois,   Pierre; Simioni,   Michel.
We present a methodology allowing to introduce manufacturers and retailers vertical contracting in their pricing strategies on a differentiated product market. We consider in particular two types of non linear pricing relationships, one where resale price maintenance is used with two part tariffs contracts and one where no resale price maintenance is allowed in two part tariffs contracts. Our contribution allows to recover price-cost margins from estimates of demand parameters both under linear pricing models and two part tariffs. The methodology allows then to test between different hypothesis on the contracting and pricing relationships between manufacturers and retailers in the supermarket industry using exogenous variables supposed to shift the...
Tipo: Conference Paper or Presentation
Palavras-chave: Vertical contracts; Two part tariffs; Double marginalization; Collusion; Competition; Manufacturers; Retailers; Differentiated products; Water; Non nested tests; Industrial Organization; L13; L81; C12; C33.
Ano: 2006
URL: http://purl.umn.edu/25685

A Stochastic-Dynamic Model of Costly Reversible Technology Adoption
Provedor de dados: 31
Autores: Baerenklau,   Kenneth A.; Knapp,   Keith C.
We develop a stochastic-dynamic model of technology adoption that imposes fewer restrictions on behavior than do previous studies of similar decision problems.  Like these previous studies, our model is forward-looking and can be used to demonstrate the additional "hurdle rate" that must be met before adoption will take place when the future state of the world is uncertain.  Unlike these previous studies, our approach does not impose the untenable assumptions that investment in a new technology is irreversible or that technologies have unlimited useful lifetimes.  Rather, we address the more reasonable situation of costly reversibility and limited lifetimes.  Our solution method utilizes Bellman's equation and standard dynamic programming techniques....
Tipo: Conference Paper or Presentation
Palavras-chave: Dynamic optimization; Irrigation; Reversible; Technology adoption; Water; Research and Development/Tech Change/Emerging Technologies.
Ano: 2005
URL: http://purl.umn.edu/19156

ESTIMATIVA DA DEMANDA DE ÁGUA RESIDENCIAL URBANA NO ESTADO DO CEARÁ
Provedor de dados: 31
Autores: Fontenele,   Raimundo Eduardo Silveira; Rosa,   Antonio Lisboa Teles da; Nogueira,   Claudio Andre Gondim.
This study determined a function demand for residential water. The data were stratified by geographic areas according to the level of regularity of water supply to the households. Income, price, number of rooms and persons in the households were found to be the main variables influencing the level of water consumption. Differences between: i) households connected to the water and sewage systems and those connected only to the water system; ii) households with up to 20 m3 of water consumption and those with consumption between 20 and 50 m3 and finally those with consumption above 50 m3 were surveyed. The results of the residential water demand were, in general, statistically significant and the coefficients presented the expected sign. These results are...
Tipo: Journal Article
Palavras-chave: Demand; Water; Tariff; Ceará; Agribusiness; Agricultural Finance; Industrial Organization.
Ano: 2009
URL: http://purl.umn.edu/90692

Integrated participatory modelling of irrigated agriculture: the case study of the reorganisation of a water management system in Italy
Provedor de dados: 31
Autores: Bazzani,   Guido Maria.
The paper presents an application of the new version of the 'Decision Support for Irrigated agriculture' DSIrr designed to integrate water and agricultural policy analysis and to support participatory decision process. The tool is a scenario manager for bio-economic farm models considering climatic, agronomic, hydraulic, socio-economic and environmental aspects. The paper offers some insight on the decomposition approach adopted to integrate economic analysis at different scales by illustrating a case study conducted in Italy to support an ex ante evaluation of a water management system reorganisation. Reduce water consumption is a strategic objective which pricing policy cannot address given technical constraints. The replacement of the existing...
Tipo: Conference Paper or Presentation
Palavras-chave: Water; Agriculture; Economic analysis; Modelling and tools; Participatory process; Agricultural and Food Policy; Land Economics/Use; Research Methods/ Statistical Methods; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/6496

The Global Supply and Demand for Agricultural Land in 2050: A Perfect Storm in the Making?
Provedor de dados: 31
Autores: Hertel,   Thomas W.
2010 AAEA Presidential Address; forthcoming in January 2011 AJAE in shortened version.
Tipo: Conference Paper or Presentation
Palavras-chave: Global agriculture; Land use; Projections; Population; Yields; Urbanization; Biodiversity; Water; Climate change; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Environmental Economics and Policy; Food Consumption/Nutrition/Food Safety; International Development; International Relations/Trade; Land Economics/Use; Productivity Analysis; Research and Development/Tech Change/Emerging Technologies; Q11; Q15; Q16; Q17.
Ano: 2010
URL: http://purl.umn.edu/92639

Productividad, disposicion al pago y eficiencia tecnica en el uso del agua: la horticultura intensiva de la Region de Murcia
Provedor de dados: 31
Autores: Colino Sueiras,   Jose; Martinez Paz,   Jose Miguel.
RESUMEN Este trabajo presenta los resultados derivados de un estudio sobre eficiencia y productividad del agua en la horticultura intensiva litoral del sureste español. Tras la caracterización de esta actividad productiva, se analizan 230 encuestas directas a horticultores y 50 entrevistas a técnicos agrarios realizadas en la campaña 2004/2005, calculando la productividad aparente y los precios de nivelación y cierre para los cultivos más característicos. Seguidamente se estima la disposición al pago por el agua de los horticultores, la cual muestra una relación positiva con los niveles de eficiencia técnica previamente estimados para este sistema productivo.  ABSTRACT This work presents some results derived from a study on efficiency and productivity of...
Tipo: Journal Article
Palavras-chave: Water; Intensive horticulture; Efficiency; Willigness to pay; Agua; Horticultura intensiva; Eficiencia tecnica; Disposicion al pago; Resource /Energy Economics and Policy; Q12; C61.
Ano: 2007
URL: http://purl.umn.edu/7058

Impacts of changing water price and availability on irrigated dairy farms in northern Victoria
Provedor de dados: 31
Autores: Ho,   Christie K.M.; Armstrong,   Dan P.; Doyle,   Peter T.; Malcolm,   Bill.
Farming systems throughout the Murray-Darling Basin are under increasing scrutiny from the perspective of ecological sustainability of farm and catchment systems. In northern Victoria, the dairy industry is a major user of water, and contributes to the environmental issues. Changes in irrigation water price, availability and policy will invariably impact on the viability of dairy farming in this region, but the diversity of dairy farm systems suggests that the impact will vary between farms. Two case study farms, a 'water reliant' farm and a 'fodder reliant' farm, were used to examine economic and social impacts of changes in water price, availability and policy.
Tipo: Conference Paper or Presentation
Palavras-chave: Dairy; Irrigation; Water; Agribusiness; Resource /Energy Economics and Policy.
Ano: 2004
URL: http://purl.umn.edu/58707

Agriculture in a Water-Scarce World
Provedor de dados: 31
Autores: Gilmour,   Brad; Jotanovic,   Aleksandar; Gurung,   Rajendra Kumar; Polcyn,   Tania; Deng,   Hugh.
With a relatively small population and 7% of the world's available freshwater resources, Canada is well placed for a world of water scarcity where the real value of water in its many uses becomes more and more apparent.  However, action is necessary to ensure that Canada continues to benefit from the social, economic and environmental goods and services derived from water resources. Experience and analysis suggests that policy and incentives play critical roles in the sustainable exploitation of natural resources. In particular, properly valuing water in all its forms and uses appears to be critical.   Analysis abroad has underlined the benefits of clearly delineating the roles of regulators, resource managers, infrastructure operators and service...
Tipo: Report
Palavras-chave: Water; Governance; Scarcity; Incentives; Sustainability; Valuation; Accountability; Transparency; Environmental Economics and Policy; Institutional and Behavioral Economics; International Relations/Trade; Resource /Energy Economics and Policy.
Ano: 2007
URL: http://purl.umn.edu/46689

Analysis of Water in the Chicken Eggshell Using the 1H Magic Angle Spinning Nuclear Magnetic Resonance Spectroscopy
Provedor de dados: 89
Autores: Szeleszczuk,Ł; Pisklak,DM; Wawer,I.
ABSTRACT The water content of the chicken eggshell has a major influence on gas (CO2 and O2) permeability. Inappropriate water loss during the incubation period increases embryo mortality and decreases chick quality. So far only the procedures that enable to determine the total water content in the eggshell have been described and developed. Our analysis of the 1H MAS NMR spectra of the chicken eggshell samples revealed three signals, differing significantly in the chemical shift and relaxation times (T1) parameters. In this work we have assigned those signals and described the changes in their intensities that occur during the incubation period. Using 1H MAS NMR it is possible to distinguish two types of water reservoirs in the chicken eggshell. This...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water; Chicken eggshell; NMR; Incubation.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000600027

Effect of Genetic Strain and Sex on Water Absorption and Water-To-Protein Ratio in Chicken Meat
Provedor de dados: 89
Autores: Ferrari,MJGS; Mariussi,AC; Zucatto,DAA; Sereno,MJ; Garcez-Neto,AF; Bersot,LS.
ABSTRACT The objectives of the present study were to evaluate the water and protein contents and the water-to-protein ratio of chicken parts before and after the pre-chilling process, to compare these results with the values officially recommended by the Brazilian Ministry of Agriculture, and to evaluate the effect of genetic strain and sex on these parameters. Water (%) and protein (%) contents, and water-to-protein ratio (WPR) of boneless and skinless breast (FILLETS) and breast with bone and skin (BREAST) were determined before (BPC) and after (APC) carcass pre-chilling. A total of 585 samples were evaluated: 221 fillets/male, 216 breasts/male, 76 fillets/female, and 72 fillets/female of four different broilers strains were evaluated before (BPC) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water absorption; Carcasses; Chicken; Poultry meat; Water.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000200299

Different sodium levels and electrolyte balances in pre-starter diets for broilers
Provedor de dados: 89
Autores: Maiorka,A; Magro,N; Bartels,HAS; Kessler,AM; Penz Jr,AM.
An experiment with 400 one-day-old male chicks (Ross) was conducted to evaluate the effects of different Na levels (0.10, 0.22, 0.34 and 0.46%) and different cation/anion balances (Na+K-Cl) (100, 150, 200, 250 and 300 meq/kg) in pre-starter diets on broiler performance. The corn and soybean-based diets had 22% crude protein and 2,900 kcal/kg metabolizable energy and were fed ad libitum. Performance data showed a positive quadratic effect of increasing Na levels on feed and water consumption, weight gain and feed conversion. Na+K-Cl also had a quadratic influence on feed intake and weight gain. None of the effects tested affected the amount of water measured in excreta. Derivatives of obtained regression equations pointed to optimal Na levels of 0.45% for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler; Chlorine; Electrolyte balance; Performance; Potassium; Sodium; Water.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2004000300002

Water intake behavior of broiler chickens exposed to heat stress and drinking from bell or and nipple drinkers
Provedor de dados: 89
Autores: Bruno,LDG; Maiorka,A; Macari,M; Furlan,RL; Givisiez,PEN.
The aspects involved in broiler water intake are not well known, despite the importance of water in animal nutrition and physiology. Water intake behavior should be taken into account when deciding on different types of drinkers. Bell and nipple drinkers are the most commonly used in commercial broiler production. Broilers were housed in cages equipped with two different drinker types and raised at two different environmental temperatures (25 and 34 ºC) to evaluate water intake behavior and volume. Broiler water intake behavior was influenced by drinker type. Birds visited bell drinkers less often, but presented higher total water intake per visit to the drinker as compared to those drinking from nipple drinkers. The results of this study suggest that both...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Behavior; Broilers; Ingestion pattern; Water.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000200009

Drinking water as a risk factor to poultry health
Provedor de dados: 89
Autores: Amaral,LA do.
In the poultry industry, the use of water with adequate physical, chemical and microbiological quality it is of fundamental importance. Since many birds have access to the same water source, quality problems will affect a great number of animals. The drinking water plays an important role in the transmission of some bacterial, viral and protozoan diseases that are among the most common poultry diseases. Important factors to prevent waterborne diseases in broiler production are the protection of supply sources, water disinfection and the quality control of microbiological, chemical and physical characteristics. Water is an essential nutrient for birds and therefore quality preservation is fundamental for good herd performance. The farmer may prevent many...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microbiological quality; Poultry industry; Water.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2004000400001

Partial characterization of genes from the embryonic axis of Melanoxylon brauna Schott. (Leguminosae-Caesalpinioideae) seeds
Provedor de dados: 95
Autores: Silva,Mirian de Sousa; Brommonschenkel,Sérgio Hermínio; Faria,José Márcio Rocha; Borges,Eduardo Euclydes de Lima e.
The objective of this study was to partially characterize some genes involved in the desiccation tolerance of the embryonic axis of Melanoxylon brauna seeds subjected, or not, to oven fast-drying. Seeds were initially dried rapidly in an oven at 40 ºC, 50 ºC, 60 ºC, 70 ºC, and 80 °C, for 24, 48 and 72 h and then subjected to germination tests and moisture content determination. Degenerate primers were designed for 19 genes. The CDNA was used as a template for PCR amplifications using the degenerate primers, and the PCR products obtained were purified, cloned and sequenced. The seeds showed a gradual reduction in percent germination with increasing temperature and drying time. Nucleotide sequences of the cloned fragments related to genes CAT1, SPS1, Abi5,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water; Stress; Drying; Sequencing.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000100004

Effect of water restriction and sodium levels in the drinking water on broiler performance during the first week of life
Provedor de dados: 96
Autores: Castro,Emilio Eduardo Cura; Penz Júnior,Antônio Mário; Ribeiro,Andréa Machado Leal; Sbrissia,André Fischer.
A trial was carried out to evaluate the performance of female ROSS 308 broilers, from 1 to 21 days of age, submitted to 20% of water restriction (WR) or ad libitum water and four different sodium levels by adding NaCl to the drinking water (0, 150, 300, or 450 ppm) from 1 to 7 days of age. A control group, with four replications (rep), housed one day before the beginning of the experiment, was used as reference for WR calculation. Two commercial diets where fed from 1 to 7 days and from 8 to 21 days to all birds. The chicks were raised in battery cages. A randomized complete design, in a 2 × 4 factorial arrangement, with four replications/treatment and 14 birds/replicate, was applied. Feed intake (FI), weight gain (WG) and feed conversion ratio (FCR) in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broilers; Compensatory growth; Minerals; Water.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009001100014

Effect of water stress on the growth of Arachis pintoi plants under different nitrogen levels
Provedor de dados: 96
Autores: Sales,Rita Manuele Porto; Fries,Daniela Deitos; Bonomo,Paulo; Pires,Aureliano José Vieira; Campos,Cleide Nascimento; Brito,Paulo Henrique Rodrigues; Pereira,Iracema Souza; Santos,Joelma da Silva.
The objective was to evaluate the growth of Arachis pintoi fertilized with nitrogen and water deficiency conditions. The study was developed in a 4 × 4 factorial arrangement with four nitrogen levels (0, 40, 80 and 120 kg N/ha) and four irrigation levels (25, 50, 75 and 100% of field capacity), in a completely randomized experimental design, with four replications. High doses of N benefited the production of root shoots while the root increased its production at a dose of 40 kg N/ha. The number of green and senescent leaves were influenced by N fertilization and the water regime, where higher doses of N provided greater total number of green leaves (364 leaves/pot) and the limitation of water resulted in a greater number of senescent leaves (78...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Legume; Morphogenesis; Root; Water.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000300001

Influence of water restriction on the performance and organ development of young broilers
Provedor de dados: 96
Autores: Viola,Teresa Herr; Ribeiro,Andréa Machado Leal; Penz Júnior,Antônio Mário; Viola,Eduardo Spillari.
The experiment was carried out to evaluate the effect of 0%, 10%, 20%, 30%, and 40% water restriction (WR) on broiler performance, behavior, organ development (heart, leg, proventriculus and gizzard, liver, and intestines), and intestinal micrometry. Four hundred and eighty ROSS 308 male broilers were raised in battery cages measuring 0.72 m², from 1 to 21 days of age. Feed was offered ad libitum, and environmental temperatures were kept in thermoneutral conditions. Water intake was estimated based on a control group, two days older than the experimental birds, with same initial weight. A linear reduction on bird performance, duodenal villi height, and fresh organs weight were observed as WR increased. At 21 days of age, for each 1% WR, a weight loss of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Behavior; Chickens; Duodenal morphology and histology; Organs; Water.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000200015

Assessment of WASH scenarios in urban and rural schools of a small city in the Brazilian Amazon
Provedor de dados: 36
Autores: BORGES-PEDRO,João Paulo; MÜLLER,Patricia; NUNES,Andreza Pinheiro; GOMES,Maria Cecilia R. L.
ABSTRACT This study analyzed environmental aspects of county and state managed public schools within Tefé county in the Brazilian Amazon, using the WASH concept (Water, Sanitation and Hygiene) developed by UNICEF and OMS. WASH is a strategy used since 1995, when child mortality rates were on the rise. Research was conducted using a questionnaire applied to employees of 19 primary and secondary schools, and based on WASH principles. After its application, we used an observation checklist to assess the state of the schools’ physical structure. We also conducted water quality analyses. All schools presented water contamination with total coliforms and 26% did not conduct any type of water treatment. The number of toilets in all schools was insufficient, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water; Sanitation; Hygiene; Public schools; UNICEF.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672018000100075

PHOTOSYNTHETIC PERFORMANCE AND LEAF WATER POTENTIAL OF GULUPA (Passiflora edulis Sims, PASSIFLORACEAE) IN THE REPRODUCTIVE PHASE IN THREE LOCATIONS IN THE COLOMBIAN ANDES
Provedor de dados: 37
Autores: PEREZ MARTINEZ,Laura Victoria; MELGAREJO,Luz Marina.
Gulupa, Passiflora edulis Sims (Passifloraceae), is an important fruit due to its organoleptic and nutritional characteristics and its demand in the international market; however, very few studies have been conducted for studying its Ecophysiology. Until now, this crop has spread throughout the country through empirical knowledge without data that indicate the zones that are more suitable for its cultivation. For this reason, gas exchange, chlorophyll fluorescence (photosystem II operating efficiency and maximum quantum efficiency of photosystem II photochemistry) and leaf water potential were measured in three different locations of Cundinamarca department (Chia [2610 m a.s.l., 14 °C], Granada [2230 m a.s.l., 15 °C] and Tena [2090 m a.s.l., 17 °C]), whose...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chlorophyll fluorescence; Crop; Horticulture; Passion fruit; Photosynthesis; Plant physiology; Water.
Ano: 2015
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2015000100019

Transporte de juvenis de curimbatá Prochilodus lineatus em diferentes densidades - doi: 10.4025/actascianimsci.v32i2.8415
Provedor de dados: 2
Autores: Gonçalves, André Fernando Nascimento; Faculdade de Zootecnia UNESP Dracena; Takahashi, Leonardo Susumu; Faculdade de Zootecnia UNESP Dracena; Urbinati, Elisabeth Criscuolo; Centro de Aquicultura da UNESP (CAUNESP); Biller, Jaqueline Dalbello; Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal FCAV-UNESP; Fernandes, João Batista Kochenborger; Centro de Aquicultura da UNESP (CAUNESP).
Neste estudo foi avaliado o efeito do transporte de curimbatá Prochilodus lineatus, em três densidades (100, 150 e 250 g L-1), sobre a sobrevivência e variáveis metabólicas, iônicas e hematológicas (série vermelha). Juvenis de curimbatá foram transportados em sacos plásticos durante 6h e amostrados antes da embalagem, imediatamente após a chegada, 24 e 96h após o transporte. Os peixes transportados na densidade mais alta apresentaram maior mortalidade durante o período de recuperação. As variáveis físico-químicas da água: condutividade e amônia total apresentaram maiores valores quanto maior a densidade (p &lt; 0,05), enquanto no oxigênio dissolvido ocorreu o inverso. A glicemia observada na chegada estava elevada, reduzindo-se significativamente 96h...
Tipo: Pesquisa
Palavras-chave: 5.06.03.04-3; 5.04.05.02-0; 5.04.05.00-4 Prochilodus; Estresse; Hematologia; Metabólitos; Íons; Águ Piscicultura; Manejo de Animais; Produção Animal Prochilodus; Stress; Hematology; Metabolites; Ions; Water.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/8415

Microbiological water quality and gill histopathology of fish from fish farming in Itapecuru-Mirim County, Maranhão State - doi: 10.4025/actascibiolsci.v34i2.8460
Provedor de dados: 3
Autores: Santos, Debora Martins Silva; Universidade Estadual do Maranhão; Cruz, Cristiano Ferreira; Universidade Estadual do Maranhão; Pereira, Dayane Pestana; Universidade Estadual do Maranhão; Alves, Lúcia Maria Coelho; Universidade Estadual do Maranhão; Moraes, Flávio Ruas de; Faculdade de Ciências Agrárias e Veterinárias / Universidade Estadual Paulista “Júlio de Mesquita Filho" / Jaboticabal.
The present study evaluated the microbiological water quality and tissue lesions in gills from Nile tilapia (Oreochromis niloticus) and hybrid tambacu (Colossoma macropomum female x Piaractus mesopotamicus male). For this, water and gills were collected from fish farming at six locations in Itapecuru-Mirim County, Maranhão State. Microbiological water analyses revealed contamination by total coliforms, Escherichia coli and heterotrophic bacteria. In the gills, we observed a diversity of Gram-positive and Gram-negative bacteria. The tissue lesions were: lamellar fusion, interlamellar hyperplasia, sub-epithelial edema and telangiectasia. Inflammatory lesions were not observed. Significant statistical difference (p &amp;gt; 0.05) was not detected when...
Palavras-chave: Ciências Biológicas coliforms; Water; Lesions; Gill epithelium; Tilapia; Tambacu.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/8460

Ecotypes and virulence factors of Salmonella spp. detected in shrimp farms in State of Ceara, Brazil
Provedor de dados: 3
Autores: Carvalho, Fátima Cristiane Teles de; Rodriguez, Marina Teresa Torres; Menezes, Francisca Gleire Rodrigues de; Sousa, Oscarina Viana de; Hofer, Ernesto; Vieira, Regine Helena Silva dos Fernandes.
 Our objective was to group in ecotypes 12 serovars of Salmonella isolated from shrimp farming environments in the State of Ceara (Northeast Brazil). Grouping was done based on genotypic virulence factors. Two groups based on the similarity of the Box-PCR were identified: a group consisting of three strains (01 S. ser. Madelia serovar and 02 S. ser. enterica subs. houtenae) and another group consisting of nine isolates (02 S. ser. Saintpaul serovars; 03 S. ser. Infantis; 02 S. ser. Panama; 01 S. enterica subs. enterica; and 01 S. enterica subs. houtenae). Distribution pattern of the serovars was not influenced by the origin matrices (water and sediment). Plasmid virulence genes pefA and invA were detected, unrelated to the serovar and environmental origin...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sediment; Water; Enteric bacteria.
Ano: 2017
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/34607

Assessment of the CERES-Rice model for rice production in Ibadan, Nigeria
Provedor de dados: 111
Autores: Christopher Oluwakunmi Akinbile; FUTA.
CERES-Rice model was used to simulate growth and yield of a new rice variety in Nigeria with the attention on rates of water application, one major factor that retards crop’s grain yield. The rates were full irrigation (100%ET), medium (75% ET), average (50% ET) and low (25% ET) irrigation intervals. The NEw RIce for AfriCA (acronym for NERICA) 2 variety was grown at the International Institute for Tropical Agriculture (IITA), Ibadan, Nigeria. Experimental agronomic values of parameters such as plant height, root depth, canopy shading, Leaf area index (LAI), biomass and grain yield in relation to water use were obtained and compared with simulated modelled values from CERES and the results were subjected to statistical analysis. The model predicted...
Palavras-chave: Agricultural Engineering; Soil and Water Conservation Engineering Rice; Model; Water; Simulation; Production; Food security.
Ano: 2013
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2405

Comparative between different parameters under automate drip irrigation for cucumber
Provedor de dados: 111
Autores: Khattab, Yosria Kamal.
Abstract: Automate drip irrigation in greenhouse was conducted at Elhssen Agriculture Authriuts, Giza governorate, Egypt. The aim of this researcher is to use the new Laser Leaf Control Unit (LLCU) as a tool to operate the automate drip irrigation system in greenhouse. Comparative study between Laser Beam Transmit (LBT) build in the (LLCU), different temperature (dt) and Soil Moisture Content (SMC) were carried for irrigated cucumber. Three instruments used; 1) Laser Leaf Control Unit (LLCU); 2) Infrared Thermometer (IR) used to measure canopy temperature around plant leaf (Tc) and air temperature (Ta) to estimate dtc °C; 3) Soil Moisture Meter (SMM) to measure Soil Moisture Content (SMC). The result exhibited that there is a relationship between the LBT,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: National Institute of Laser Enhanced Science; Cairo University Laser; Sensor; Water; Leaves; Automate; Irrigation; Wavelength; Cucumber.
Ano: 2019
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4840

EFFECT OF TREATED SEWAGE SLUDGE ON THE QUALITY OF OKRA FRUIT
Provedor de dados: 111
Autores: Kuti, Ibrahim Abayomi; Kuti, Ibrahim Abayomi; Musa, John Jiya; Adeoye, Peter Aderemi; Animashaun, Murtala Iyanda; Abbah, Victor; Adabembe, B. A.; Aroboinosen, Hillary.
Treated sewage sludge (Defective) has been identified to increase heavy metals in the soil which are in turn transferred to plants. In view of this, the study is aimed at assessing the effects of treated sewage sludge on the quality parameters of okra fruits. The randomized block design was employed in raising okra plants with three treatments (0t/ha, 10t/ha, and 20t/ha sewage sludge amendment) over a land area of 56.3m2. Soil analysis was used to determine the level of nitrogen, phosphorus, and potassium in the soil. After 2months, the okra fruits were harvested by cutting the pods off, slicing, oven drying, milling, and labeled correctly prior to laboratory analysis. The heavy metal content in the okra fruit were analysed using atomic absorption...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Waste managament Soil; Water; Sewage Sludge; Heavy Metals; Okra Fruit.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4330

Design, fabrication and evaluation of horizontal rotary separator of olive oil (Three-Phase Decanter)
Provedor de dados: 111
Autores: Rashvand, Mahdi; Akbarnia, Abbas.
Olive is one of the strategic products in Iran, and due to the significant cultivation area of this product, oil companies should be equipped with suitable processing equipment. Unfortunately, despite the high capacity of olive in Iran, oil companies are equipped with imported machines. In this study, the construction and evaluation of the Three-counter device of Iran has been developed. The machine has three oil, water and olive pulp outputs. In order to evaluate the machine, the amount of moisture content and fat extracted from the machine was checked at 2500 and 3500 rpm and 30 and 45% water content. Also, four different samples Manzallina, Fishemi, Kalamata and Oily were used in this experiment. The main components of the machine include an electric...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Olive; Oil; Water; Pulp; Moisture; Fat.
Ano: 2019
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5344

Pathogenic Vibrio species isolated from estuarine environments (Ceará, Brazil) - antimicrobial resistance and virulence potential profiles
Provedor de dados: 42
Autores: MENEZES,FRANCISCA G.R. DE; RODRIGUEZ,MARINA T.T.; CARVALHO,FÁTIMA C.T. DE; REBOUÇAS,ROSA H.; COSTA,RENATA A.; SOUSA,OSCARINA V. DE; HOFER,ERNESTO; VIEIRA,REGINE H.S.F.
ABSTRACT Detection of virulent strains associated with aquatic environment is a current concern for the management and control of human and animal health. Thus, Vibrio diversity was investigated in four estuaries from state of Ceará (Pacoti, Choró, Pirangi and Jaguaribe) followed by antimicrobial susceptibility to different antimicrobials used in aquaculture and detection of main virulence factors to human health. Isolation and identification were performed on TCBS agar (selective medium) and dichotomous key based on biochemical characteristics, respectively. Nineteen strains of genus Vibrio were catalogued. Vibrio parahaemolyticus (Choró River) and V. alginolyticus (Pacoti River) were the most abundant species in the four estuaries. All strains were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vibrio spp.; Pathogen; Estuaries; Public health; Water.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000301175

Achieving the Sustainable Development Goal 06 in Brazil: the universal access to sanitation as a possible mission
Provedor de dados: 42
Autores: DIAS,CINTIA M.M.; ROSA,LUIZ P.; GOMEZ,JOSE M.A.; D’AVIGNON,ALEXANDRE.
ABSTRACT  Sanitation (which includes national public policies for drinking water, sewage services and waste management) is precarious in Brazil and therefore poses a challenge to a range of actors. Poor sanitation impacts public health, education, the environment, and daily life. Globally, it emits increasing greenhouse gases. Universalization of any major public service appears difficult, if not impossible; however, Brazil’s program to universalize access to electricity proves the opposite, as will be shown in this paper. By describing the successful implementation of electricity for everyone, we show that planned public efforts, coordinated with private initiatives and local communities, have worked, and the same can be achieved for the sanitation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solid Waste (SW); Water; Sewage; Sanitation; Greenhouse gases; Sustainable Development Goals (SDGs).
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401337

Effectiveness of Cryptosporidium spp. oocysts detection and enumeration methods in water and milk samples
Provedor de dados: 45
Autores: Machado,E.C.L.; Stamford,T.L.M.; Alves,L.C.; Melo,R.G.; Shinohara,N.K.S.
Cryptosporidium spp. oocyst recovery in water and milk samples was evaluated. Samples were inoculated with a suspension of 1.2×10(7) Cryptosporidium spp. oocysts and submitted to centrifugal flotation, using different solutions (sucrose, NaCl, MgSO4, ZnSO4, AlSO4, NH4SO4 40% and NH4SO4 80%). Centrifugation of the samples was carried out in two stages for concentration using two methods that differed in the order in which the saturated solutions were used, namely only in the first stage of method I and only in the second stage of method II. Oocyst identification was performed using the Kinyoun and Koster histochemical staining techniques. Samples analyzed by method I showed different degree of oocyst recovery, namely 10.9% with NaCl and 42.5% with MgSO4 in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oocyst; Cryptosporidium spp.; Concentration methods; Water; Milk.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352006000300023

Silage of rehydrated corn grain
Provedor de dados: 45
Autores: Mombach,M.A.; Pereira,D.H.; Pina,D.S.; Bolson,D.C; Pedreira,B.C.
ABSTRACT The objective with this study was to evaluate the effect of different levels of water inclusion on the chemical composition and fermentation profiles of reconstituted corn grain silage. The experiment was carried out in a factorial arrangement in a completely randomized design, with three replicates per treatment. Five treatments were evaluated with different levels of water inclusion (% of the natural matter): dry corn grain (control); 90% dry corn grain (DCG) and 10% water; 80% DCG and 20% water; 70% DGC and 30% water; and 60% DCG and 40% water, totaling 45 experimental silos. Inclusion of water in the silage of reconstituted corn grain promoted a reduction in the CP (%) and NDF (%) contents. However, the water increase elevated the NPN/TN...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water; Concentrate; Ensiling; Fermentation; Moisture.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000300959

A low cost apparatus for measuring the xylem hydraulic conductance in plants
Provedor de dados: 53
Autores: Pereira,Luciano; Mazzafera,Paulo.
Plant yield and resistance to drought are directly related to the efficiency of the xylem hydraulic conductance and the ability of this system to avoid interrupting the flow of water. In this paper we described in detail the assembling of an apparatus proposed by TYREE et al. (2002), and its calibration, as well as low cost adaptations that make the equipment accessible for everyone working in this research area. The apparatus allows measuring the conductance in parts of roots or shoots (root ramifications or branches), or in the whole system, in the case of small plants or seedlings. The apparatus can also be used to measure the reduction of conductance by embolism of the xylem vessels. Data on the hydraulic conductance of eucalyptus seedlings obtained...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water; Conductivity; Cavitation; Embolism.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052012000400017

Effect of vacuum impregnation temperature on the mechanical properties and osmotic dehydration parameters of apples
Provedor de dados: 52
Autores: Paes,Sabrina Silva; Stringari,Gustavo Beulke; Laurindo,João Borges.
The effect of sucrose solution temperature on the mechanical properties, water loss (WL), solids gain (SG) and weight reduction (WR) of apples (Fuji var.) treated by vacuum impregnation was studied. Temperatures were varied from 10 to 50 ºC, using a sucrose solution of 50 ºBrix. The mechanical properties were studied throughout a stress relaxation test. The results showed that the SG varied between 10.57 and 14.29 % and the WL varied between 10.55 and 14.48 %. The treated fruit soluble solids increased with the temperature probably due to the lower viscosity of the solution. The maximum stress was highest at 10 ºC, decreasing at higher temperatures, probably due the softening of the structure.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vacuum; Impregnation; Temperature; Solids; Water; Texture.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000400018

Ultrasound efficiency in relation to sodium hypochlorite and filtration adsorption in microbial elimination in a water treatment plant
Provedor de dados: 52
Autores: Bello,Antonio Roberto Crystal; Angelis,Dejanira de Franceschi; Domingos,Roberto Naves.
Processes like ultrasound, chlorination and filtration-adsorption were compared to eliminate microorganisms and to adjust established parameters of public drinking water. A mini water treatment plant (WTP-CB), in pilot scale, was projected and built to evaluate each process influence as: decontamination, coagulation-flocculation, sedimentation and filtration. Total and fecal coliforms, Escherichia coli and heterotrophic bacteria and physic/chemical parameters were quantified from water. Ultrasound, chlorination and filtration-adsorption were efficient to inactivate and/or eliminate bacteria. Ultrasound decontamination in addition to coagulation-flocculation, sedimentation and filtration, could be considered as an alternative treatment water solution where...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water; Filtration; Microorganisms; Ultrasound; Chlorination.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000600009

Microbiological and physicochemical treatments applied to metallurgic industry aiming water reuse
Provedor de dados: 52
Autores: Bello,Antonio Roberto Crystal; Angelis,Dejanira de Franceschi de; Domingos,Roberto Naves.
A study was conducted on the reuse of the water in a system composed of a sewage treatment plant (STP) using prolonged aeration with activated sludge and a compact water treatment plant (CWTP) in a metallurgic industry. The processes for obtaining the water for reuse were microbiological and physicochemical. The domestic sewage was then pumped to the STP, where biological flocks were formed and clarified water was obtained. The efficiency of the microbiological process in the STP was evaluated for removal of biochemical oxygen demand (BOD), chemical oxygen demand (COD) and sedimentary solids (SS). The efficiency of physicochemical processes for clarifying the water and disinfection was evaluated through analysis of pH, turbidity, color, aerobic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water; Reuse; Sewage; Microorganisms; Disinfection.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000200020

Interaction between paraventricular nucleus and septal area in the control of physiological responses induced by angiotensin II
Provedor de dados: 56
Autores: Camargo,L.A.A.; Saad,W.A.; Simões,S.; Santos,T.A.B.; Saad,W. Abrão.
We determined the effects of losartan (40 nmol) and PD 123319 (40 nmol) (both non-peptides and selective antagonists of the AT1 and AT2 angiotensin receptors, respectively), and [Sar¹, Ala8] angiotensin II (ANG II) (40 nmol) (a non-selective peptide antagonist of angiotensin receptors) injected into the paraventricular nucleus (PVN) on the water and salt appetite, diuresis and natriuresis and mean arterial pressure (MAP) induced by administration of 10 nmol of ANG II into the medial septal area (MSA) of male Holtzman rats weighing 250-300 g. The volume of drug solution injected was 0.5 µl over a period of 10-15 s. The responses were measured over a period of 120 min. ANG II alone injected into the MSA induced an increase in all the above parameters (8.1 ±...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: AT1 receptors; AT2 receptors; Water; Sodium; Paraventricular nucleus; Medial septal area.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000900002

Culturable fungal diversity of shrimp Litopenaeus vannamei boone from breeding farms in Brazil
Provedor de dados: 58
Autores: Silva,Lidiane Roberta Cruz da; Souza,Odacy Camilo de; Fernandes,Maria José dos Santos; Lima,Débora Maria Massa; Coelho,Rosalie Reed Rodrigues; Souza-Motta,Cristina Maria.
Litopenaeus vannamei, which is the most common shrimp species cultivated in the northeast of Brazil, is very susceptible to microbial diseases, and this consequently affects productivity. There are reports of bacteria, viruses and protozoa in these shrimp, but not fungi. This study aims to isolate and identify fungi present in shrimp Litopenaeus vannamei, and in their nursery waters, at two breeding farms in Brazil. The pathogenic potential of the isolates was assessed through the qualitative detection of proteases and aflatoxin B production. The 146 isolated fungi comprised 46 species. Aspergillus, Penicillium and Furarium were the three most relevant genera and Aspergillus flavus was the predominant species with a total of 33 isolates. Most of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Shrimp; Fungi; Water; Protease; Aflatoxin B.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000100007

Evaluation of Petrifilm™ EC and HS for total coliforms and Escherichia coli enumeration in water
Provedor de dados: 58
Autores: Beloti,Vanerli; Souza,Juliana Aparecida de; Barros,Márcia de Aguiar Ferreira; Nero,Luís Augusto; Mattos,Marcos Rodrigues de; Gusmão,Viviane Vieira; Moraes,Luciane Bilia de.
Petrifilm™ EC and HS were compared to the MPN method to determine their efficacy to enumerate total coliforms and E. coli in 145 samples of water (76 water in natura, 69 drinking water). For water in natura, Petrifilm™ HS and EC showed good correlation with MPN method. In chlorinated water (&lt; 20 col/100 mL and negatives) the agreement was low. For E.coli enumeration, Petrifilm™ EC showed a good correlation with MPN method. The results indicated that Petrifilm™ EC and HS are accurate to enumerate coliforms and E. coli in water when the expected counts are higher than 20/100 mL.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Water; Coliforms; Escherichia coli; Petrifilm™.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000400002

Microbiological analyses of water from hemodialysis services in São Luís, Maranhão, Brazil
Provedor de dados: 58
Autores: Lima,José de Ribamar Oliveira; Marques,Sirley Garcia; Gonçalves,Azizedite Guedes; Salgado Filho,Natalino; Nunes,Paulo Cruz; Silva,Hernandes Sousa; Monteiro,Silvio Gomes; Costa,Jackson Mauricio Lopes.
Rigorous control of water quality in hemodialysis services is extremely important in order to guarantee a better quality of life of the patients submitted to this treatment. The lack of adequate water monitoring has caused the death of various patients in the past. The objective of the present study was to determine the physicochemical and bacteriological characteristics of water used by hemodialysis services in hospitals of the city of São Luís, Maranhão, Brazil. Bacteriological analyses included the membrane filter method for the determination of total coliform bacteria, the Cult-Dipcombi-TTC-agar method for heterotrophic bacteria and the limulus amebocyte lysate method for the determination of endotoxins. Eighteen water samples obtained from three...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water; Microbiology; Hemodialysis; Contamination.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000200001

Shigatoxigenic Escherichia coli serogroups O157, O111 and O113 in feces, water and milk samples from dairy farms
Provedor de dados: 58
Autores: Vicente,Hinig Isa Godoy; Amaral,Luiz Augusto do; Cerqueira,Aloysio de Mello Figueiredo.
The objective of this study was to determine the prevalence of Shigatoxigenic Escherichia coli (STEC) and STEC serogroups O157, O111 and O113 in feces, water and milk sampled in dairy farms in Jaboticabal, SP, Brazil. Feces (n=454), water (n=54) and milk samples (n=30) were collected from 10 herds and assessed for the presence of the virulence genes stx1, stx2 and eae by polymerase chain reaction (PCR). All stx and eae positive samples were submitted to a second PCR reaction targeting the sequences rfb O157, rfb O111 and rfb O113. High prevalence of stx was detected (59.9%) in fecal samples, whereas the prevalence of sequences rfb O157, rfb O111 and rfb O113 was 18.9%, 3.3% and 30.4%, respectively. All sequences were detected more frequently in calves and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Shigatoxigenic; Escherichia coli; Milk; Water; Bovine feces.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000300003

Bacterial diversity in rice-field water in Rio Grande do Sul
Provedor de dados: 58
Autores: Reche,Maria Helena Lima Ribeiro; Fiuza,Lídia Mariana.
Bacteria are the most diverse living beings on earth and only a fraction of them have been identified. This paper aims at the analysis of the diversity of mesophilic and heterotrophic bacteria found in samples of irrigation water from rice-fields areas in Rio Grande do Sul State, Brazil. Sample collection was carried out in five rice crop regions areas and followed by isolation, multiplication and bacterial characterization. The species' identification was based on biochemical tests (API-System, bioMérieux). Bacterial diversity was determined by the Shannon &amp;amp; Weaner and Pielou index. The results regarding bacterial diversity revealed 26 species. The most abundant representatives belonged to the Bacillus, Corynebacterium, Staphylococcus and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacteria; Diversity; Water; Rice-field.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000300009

Antimicrobial susceptibility, hemolysis, and hemagglutination among Aeromonas spp. isolated from water of a bovine abattoir
Provedor de dados: 58
Autores: Bizani,Delmar; Brandelli,Adriano.
The presence of Aeromonas spp. in food has been demonstrated. They are often introduced from water, which is the natural habitat of many species and is thought to be the main source of contamination. The occurrence of Aeromonas spp. was investigated in 70 water samples of a bovine abattoir. Aeromonas spp. were present in 21.4% of water samples. A. hydrophila was isolated from 11.4% of supplying water samples and from 25.7% of the water drained from carcasses, whereas A. sobria was sole isolated from 5.7% of supplying water samples. Although greater number of positive samples were from water drained from carcasses, only A. hydrophila isolates were present. This suggests that the supplying water is the source of contamination. The antibiotic susceptibility...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aeromonas; Antibiotic activity; Aquatic environment; Hemolysis; Water.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822001000400016

Characterization of Francisella species isolated from the cooling water of an air conditioning system
Provedor de dados: 58
Autores: Gu,Quan; Li,Xunde; Qu,Pinghua; Hou,Shuiping; Li,Juntao; Atwill,Edward R.; Chen,Shouyi.
Strains of Francisella spp. were isolated from cooling water from an air conditioning system in Guangzhou, China. These strains are Gram negative, coccobacilli, non-motile, oxidase negative, catalase negative, esterase and lipid esterase positive. In addition, these bacteria grow on cysteine-supplemented media at 20 °C to 40 °C with an optimal growth temperature of 30 °C. Analysis of 16S rRNA gene sequences revealed that these strains belong to the genus Francisella. Biochemical tests and phylogenetic and BLAST analyses of 16S rRNA, rpoB and sdhA genes indicated that one strain was very similar to Francisella philomiragia and that the other strains were identical or highly similar to the Francisella guangzhouensis sp. nov. strain 08HL01032 we previously...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Francisella; Air conditioning; Water.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000300921

Yeasts isolated from sand and sea water in beaches of Olinda, Pernambuco state, Brazil
Provedor de dados: 58
Autores: Loureiro,Silvia Tereza Azedo; Cavalcanti,Maria Auxiliadora de Queiroz; Neves,Rejane Pereira; Passavante,José Zanon de Oliveira.
The aim of this work was to isolate and identify yeasts from sand and sea water collected in two beaches of Olinda, Pernambuco state, Brazil. Thirty two samples of both sand and water in both beaches were obtained in the dry (December 2000 and February 2001) and rainy (June and July 2001) seasons. Two hundred and ninety two strains of yeast were obtained, and they belonged to four genera and 31 species. Candida was the most prevalent genus. Candida catenulata, C. fenica, C. sake, Brettanomyces bruxelenses and Rhodotorula mucilaginosa were the most commonly found species in both beaches Bairro Novo and Casa Caiada.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Yeast; Sand; Water; Beaches.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000400005

Characteristics of cassava starch fermentation wastewater based on structural degradation of starch granules
Provedor de dados: 65
Autores: Pereira,Juliane Mascarenhas; Aquino,Ana Carolina Moura de Sena; Oliveira,Daiana Cardoso de; Rocha,Gabriela; Francisco,Alícia de; Barreto,Pedro Luiz Manique; Amante,Edna Regina.
ABSTRACT: Sour cassava starch is a naturally modified starch produced by fermentation and sun drying, achieving the property of expansion upon baking. Sour cassava starch' bakery products can be prepared without the addition of yeast and it is gluten free. The fermentation process associated with this product has been well studied, but the wastewater, with high acidity and richness in other organic compounds derived from starch degradation, requires further investigation. In this study, the structure of solids present in this residue was studied, seeking to future applications for new materials. The solids of the wastewater were spray dried with maltodextrin (MD) with dextrose equivalent (DE) of 5 and 15 and the structure of the powder was evaluated by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sour cassava starch; Fermentation; Water; Microstructure.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000400732