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Germinação de sementes de tatajuba (Bagassa guianensis Aubl.) após diferentes períodos de embebição em água. Repositório Alice
ROCHA, S. de F. R.; OHASHI, S. S.; LEÃO, N. V. M..
1999
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Tatajuba; Semente florestal; Essencia florestal; Germinação; Inversão em água; Bagassa guianensis; Amazônia; Brasil; Seeds; Forest trees; Germination; Water.
Ano: 1999 URL: http://www.alice.cnptia.embrapa.br/handle/doc/395002
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Gestión del agua público-urbana en la cabecera municipal de Tepexi de Rodríguez, Puebla. Colegio de Postgraduados
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
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Heavy metals in water, sediment and tissues of Liza saliens from Esmoriz-Paramos, Portugal. IPB - Escola Superior Agrária
Fernandes, Conceição; Fontaínhas-Fernandes, A.; Cabral, David; Salgado, Maria Antónia.
Esmoriz–Paramos lagoon is an ecosystem of great ecological importance that is located on the northwest coast of Portugal and has been degraded as a result of industrial and anthropogenic activities. Concentrations of heavy metals (Cr, Cu, Pb and Zn) were measured in water, sediment and in tissues (liver and muscle) of Liza saliens, which is the dominant fish from the lagoon. Comparisons between metal concentrations in water and sediments were made with those in tissues of fish caught at the lagoon. Metals in water were quantified predominantly bound to particulate and equalled or exceeded the limit of chronic reference values. Metal concentrations in sediments varied among sampled sites. The relative order of concentrations was “Zn>Cu∼Pb>Cr” the same...
Tipo: Article Palavras-chave: Esmoriz–Paramos; Heavy metals; Sediment; Water; Fish.
Ano: 2008 URL: http://hdl.handle.net/10198/3937
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Hydrography and flow in the Lucky Strike segment of the Mid-Atlantic Ridge ArchiMer
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
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Impact de l'aquaculture marine sur l'environnement : aspects juridiques et économiques ArchiMer
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
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Impact of removing straw from wheat and barley fields: A literature review NWISRL
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
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Impact of Water Supply Limitations from Federal Decisions in South Texas AgEcon
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
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Impacto de las acciones de rehabilitación y modernización en la productividad del distrito de riego 053, estado de Colima. Colegio de Postgraduados
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
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Impacts of Biofuels on Water Supply: Proposed Cures May Worsen the Disease AgEcon
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
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Impacts of changing water price and availability on irrigated dairy farms in northern Victoria AgEcon
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
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Impacts of considering climate variability on investment decisions in Ethiopia AgEcon
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
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Implantação de pequenos perímetros irrigados a partir de água de poços tubulares bombeada por cata-vento no Trópico Semi-Árido. Área de teste: Lagoas (Município de Petrolina, PE). Infoteca-e
RICHE, G. R.; TONNEAU, J. P..
Estudar a viabilidade de uso de aguas subterraneas em diversos niveis de salinidade e sodicidade com as seguintes hipoteses de trabalho: a salinizacao manifesta-se principalmente quando ha deficiencia na drenagem do solo; em muitos casos as altas taxas de calcio e de magnesio amenizam bastante os efeitos prejudiciais do sodio numa irrigacao bem conduzida; as aguas pluviais, de um ano para outro, encarregam-se de "dessalinizar" o solo em condicoes de drenagem livre, diminuindo os riscos de concentracao excessiva de sais soluveis na camada explorada pelo sistema radicular. Estudar a viabilidade do uso do catavento para bombeamento e transporte de agua ate os locais escolhidos para irrigacao, incluindo testes de ajuste relativos ao tamanho da bomba,...
Tipo: Documentos (INFOTECA-E) Palavras-chave: Água; Poço tubular; Catavento; Pernambuco; Petrolina; Water; Management; Wind mill; Irrigação; Irrigation.
Ano: 1992 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/133065
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Improvement of the land and water resources of the semi-arid regions of Northeast Brazil: a proposal for research. Infoteca-e
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; Clima; Solo; Manejo; Pesquisa; Proposta; Água; Irrigação; Water; Irrigation.
Ano: 1982 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/127384
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Incentives for Residential Water Conservation: Water Price, Revenue, and Consumer Equity in Florida AgEcon
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
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Increased water charges improve efficiency and equity in an irrigation system Ecology and Society
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
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India Agricultural Policy Review AgEcon
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
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Indicadores ecotoxicológicos para águas de consumo humano. Repositório Alice
MONTEIRO, R. T. R.; CONEGLIAN, C.M.R.; QUEIROZ, S. C. do N. de; MESSIAS, T. G.; SILVA, G. H. da.
Testes de toxicidade utilizando organismos vivos, são de alta vantagem em termos de custo e benefício. Mostram com rapidez a qualidade das amostras testadas quanto a toxicidade. Utiliza-se organismos padronizados, de vários níveis tróficos, os quais respondem de maneira diversa aos diversos componentes das amostras ambientais. A qualidade de águas tratadas por ETAs das cidades de Limeira e Piracicaba, SP, foram avaliadas quanto a toxicidade para o microcrustáceo Daphnia magna, celenterado Hydra attenuata, alga Pseudokirchneriella subcapitata e a bactéria Vibrio fischeri . As Daphnias e as algas mostraram se altamente sensíveis a cloração, as Hydras e Vibrio mostraram-se resistentes sendo possível ser realizados testes com águas tratadas e cloradas. O...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Trihalometanos; Resíduos de herbicidas; Daphnia; Hydra; Algas; Vibrio fischeri; Poluição da água; Herbicida; Toxidez; Organismo aquático; Ecotoxicology; Water.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/951307
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Índice de estresse hídrico da cultura (IEHC) combinado com a temperatura de estresse diário (TED) em feijoeiro (Phaseolus vulgaris L.) submetido a diferentes frequências de irrigação. Repositório Alice
ALBUQUERQUE, P. E. P.; KLAR, A.E..
O objetivo do presente trabalho foi estimar valores do indice de estresse hidrico da cultura combinado com a temperatura de estresse diario (IEHCc) em feijoeiro (Phaseolus vulgaris L.) submetido a cinco frequencias de irrigacao 2, 4, 8, 12 e 16 dias. Os tratamentos foram estabelecidos em blocos casualizados com 4 repeticoes. As temperaturas da copa vegetal (Tc) foram medidas, atraves do termometro a infravermelho em dois periodos de manha (entre 10 e 11 horas) e de tarde (entre 13 e 14 horas). A maior producao de graos (2755kg.ha4) foi obtida na frequencia de irrigacao de 2 dias, com perdas relativas de 0,181; 16,7; 42,5 e 61,6%, para as frequencias de 4, 8, 12 e 16 dias, respectivamente. Nao houve diferenca estatistica entre as frequencias de 2, 4 e 8...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Feijao; Estresse hidrico; Temperatura; Irrigacao; Frequencia; Termometria; Phaseolus vulgaris; Bean; Water; Stress; Temperature; Irrigation; Frequency; Thermometry.
Ano: 1997 URL: http://www.alice.cnptia.embrapa.br/handle/doc/481811
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Influence of Climate Variability on the Market Price of Water in the Gila-San Francisco Basin AgEcon
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
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Influence of drinking salt water on fiber digestion in the rumen of dairy cows. Repositório Alice
WANDERLEY, R. C.; ALDEHNEH, A.; WEG ONER, T. N.; TEIXEIRA, J. C.; HUBER, J. T..
Influence of drinking salt water onfiber digestation in the rumen of dairy cows.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Drinking; Water; Fiber; Digestion; Cows; Bovino; Leite; Digestão.
Ano: 1988 URL: http://www.alice.cnptia.embrapa.br/handle/doc/42395
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