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	Provedor de dados AgEcon (15) Rev. Bras. Zool. (2) Biota Neotropica (2) Agronomy (1) Infoteca-e (1) Biological Sciences (1) Boletín de Investigaciones (1) BABT (1) Scientia Agricola (1) REA (1) PAB (1) Rev. Bras. Ciênc. Solo (1) R. Bras. Zootec. (1) Mais... Autor Baek, Jungho (2) Callisto,Marcos (2) Cho, Yongsung (2) Fleming, Ronald A. (2) Koo, Won W. (2) Molozzi,Joseline (2) Restello,Rozane M. (2) Secchi, Silvia (2) ARAÚJO,TIAGO G. P. (1) Aralas, Sarma B. (1) Araújo,Francisco Gerson (1) Avery, Dennis T. (1) Azevêdo,Evaldo de Lira (1) BUSCHINELLI, C. C. de A. (1) Babcock, Bruce A. (1) Barbosa,José Etham de Lucena (1) Beber,Caetano Luiz (1) Belli Filho,Paulo (1) Benedet,Lucas (1) Biasi,Cristiane (1) Mais... Palavra-chave Environmental quality (29) Environmental Economics and Policy (8) Water quality (4) Biomonitoring (3) Conservation Reserve Program (3) Pollution (3) Q58 (3) Resource /Energy Economics and Policy (3) Trade (3) C31 (2) Crop Production/Industries (2) Developed countries (2) Developing countries (2) Globalization (2) International Relations/Trade (2) Land Economics/Use (2) Land use (2) Nutrient management (2) Q56 (2) Soil erosion (2) Mais... Tipo do documento Info:eu-repo/semantics/article (12) Journal Article (4) Working or Discussion Paper (4) Conference Paper or Presentation (3) Report (3) Folhetos (1) Info:eu-repo/semantics/other (1) Thesis or Dissertation (1) Mais... Ano 2022 (1) 2021 (1) 2019 (1) 2018 (1) 2016 (2) 2015 (1) 2014 (3) 2013 (1) 2011 (1) 2010 (3) 2009 (1) 2008 (2) 2007 (2) 2006 (2) 2005 (1) 2004 (2) 1998 (1) 1996 (1) 1995 (2) Mais... País United States (15) Brazil (13) Colombia (1) Idioma Inglês (28) Português (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 29 Primeira ... 1 2 ... Última Fast immersion to test the stability of aggregates in water: consequences for interpreting results from tropical soil classes Agronomy Silva, Rodrigo Fonseca da; Cipriano, Patriciani Estela; Siueia Junior, Matias; Mars, Geslin; Dias Junior, Moacir de Souza. Aggregates are the primary structural components of soil and have been used as an indicator of soil quality in conservation systems. The objective of this study was to analyse the effect of slow pre-wetting on the results of the aggregate stability test for different classes of tropical soils. Data were arranged in a 2 x 4 factorial design with three replications, in which the first factor comprised the two methods of pre-treatment on soil aggregates: without pre-wetting (WOPW), which considered the moisture of the aggregates in the field, and with pre-wetting (WPW), which considered the slow wetting of aggregates through capillarity on wet filter paper for 24h. The second factor consisted of four soil classes: Typic Dystrustept (Cambissolo Aplico... Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil structure; Environmental quality; Geometric mean diameter.. Ano: 2019 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42453 Histopathological evaluation of seven Amazon species of freshwater ornamental armored catfish Biological Sciences Fujimoto, Rodrigo Yudi; Embrapa Tabuleiros Costeiros; Neves, Mikaelle de Souza; Universidade Federal do Pará; Santos, Rudã Fernandes Brandão; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Cruz, Claudinei da; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Diniz, Daniel Guerreiro; Universidade Federal do Pará; Eiras, Jorge Costa; Universidade do Porto. Fish commonly known as acaris or plecos are freshwater armored catfish economically important as a food resource and as ornamental fish. Most of these species are captured in the Amazon region. However, despite its economic importance, there is a lack of knowledge about their biological aspects. Thus, this study aimed to characterize and evaluate the histopathological aspects of important organs as gills, liver, integument and kidney of seven species of armored freshwater ornamental catfish fromGuamáRiver,Pará State,Brazil. All organs showed typical characteristics of organs of other teleosts. In some species, gills and liver showed slight histopathological changes: telangiectasis, edema and morphological changes related to the presence of parasites... Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish; Environmental quality; Acaris; Histology Histologia Animal. Ano: 2014 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/22423 Ecological assessment of a southeastern Brazil reservoir Biota Neotropica Martins,Isabela; Sanches,Barbara; Kaufmann,Philip Robert; Hughes,Robert M.; Santos,Gilmar Bastos; Molozzi,Joseline; Callisto,Marcos. Reservoirs are artificial ecosystems with multiple functions having direct and indirect benefits to humans; however, they also cause ecological changes and influence the composition and structure of aquatic biota. Our objectives were to: (1) assess the environmental condition of Nova Ponte Reservoir, Minas Gerais state, southeastern Brazil; and (2) determine how the aquatic biota respond to disturbances. A total of 40 sites in the littoral zone of the reservoir were sampled to characterize physical and chemical habitat, land use, and benthic macroinvertebrate and fish assemblages. The predominant type of land cover near the reservoir was natural vegetation. A total of 29 fish species and 39 macroinvertebrate taxa were collected, including eight alien... Tipo: Info:eu-repo/semantics/article Palavras-chave: Reservoirs; Water quality; Bioindicators; Physical habitat; Environmental quality. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032015000100103 Potential ecological distribution of alien mollusk Corbicula largillierti and its relationship with human disturbance in a semi-arid reservoir Biota Neotropica Azevêdo,Evaldo de Lira; Barbosa,José Etham de Lucena; Vidigal,Teofânia Heloisa Dutra Amorim; Marques,João Carlos; Callisto,Marcos; Molozzi,Joseline. The introduction of exotic mollusk species has resulted in loss of biodiversity in semi-arid neotropical aquatic ecosystems. This study aims to relate the presence and density of Corbicula largillierti species to human disturbance, providing data for the conservation and management of aquatic ecosystems. Specimens were collected at Epitácio Pessoa reservoir in December 2011 and June 2012, presenting densities of 20.96 and 62.89 individuals per square meter, respectively. Anthropic disturbance metrics were calculated considering the presence, type and intensity of disturbance in littoral, riparian and flood zones. The occurrence of C. largillierti was mainly associated to the variables total phosphorus (261.05 ± 342.22 µg/L) and total nitrogen (440.79 ±... Tipo: Info:eu-repo/semantics/article Palavras-chave: Corbiculidae; Anthropic disturbance; Environmental quality. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032016000100107 The environmental recovery of the main tourist destinations in the Colombian Caribbean during the Covid-19 quarantine Boletín de Investigaciones Correa-Ramirez,Marco; Pacheco,Wilberto; Ricaurte-Villota,Constanza. ABSTRACT To counteract the spread of the Covid-19 pandemic disease, the Colombian government decreed a quarantine period from March 24 to July 1, 2020, which forced the cessation of tourist activities and the closure of the main tourist destinations of the Colombian Caribbean: Santa Marta, Cartagena, and San Andrés. During this period, a significant increase in the environmental quality of these coastal zones was perceived. To quantify environmental changes in the coastal zone, the variation in chlorophyll concentration and total suspended solids observed by the Sentinel-3 satellite mission, 30 days before and after the start of the quarantine, was analyzed. The results showed a decrease in the concentration of chlorophyll (> 20 %) and suspended solids... Tipo: Info:eu-repo/semantics/article Palavras-chave: Coastal zone; Environmental indices; Remote sensing; Environmental quality; Covid-19.. Ano: 2021 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612021000200161 Assessing of biotic integrity of the fish community in a heavily impacted segment of a tropical river in Brazil BABT Pinto,Benjamin Carvalho Teixeira; Araújo,Francisco Gerson. A index of biotic integrity (IBI) was applied to assess the ecological health at seven sites of ca. 338 km extension of the Paraíba do Sul river, in bracketing a large urban-industrial complex. The aim was to evaluate the index response to changes in environmental quality during two seasons (winter/dry versus. summer/wet). Eight metrics were selected to IBI in three categories: 1) species richness and habitat composition; 2) indicator species; and 3) trophic structure. The IBI, based on the least impacted regional condition, showed the highest value at the most upstream site (Queluz=km 0) - Acceptable, then decreasing downstream and reaching the lowest record at Volta Redonda (km 125) - Impacted; afterwards there was an increasing quality toward the most... Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish community; IBI; Environmental quality; Habitats; Tropical rivers; Biomonitoring. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000300015 Fuzzy modeling in the prediction of climate indices and productive performance of quails kept in climate chamber REA MARQUES,JORDÂNIO I.; LOPES NETO,JOSÉ P.; LOPES,FERNANDA F. DE M.; FURTADO,DERMEVAL A.; ARAÚJO,TIAGO G. P.. ABSTRACT With the demand in the production at large-scale food, confinement of animals has become a necessity of the productive process because of the increase in production capacity and optimization of the spaces reserved for creations. In this context, the aim of this study was the development and validation of models using fuzzy logic for predicting climate indices and productive performance of European quails kept in a climatic chamber. The model developed was analyzed from two points of view; the first one took into account the prediction of climate indexes where the input variables were the temperature (°C) and relative humidity (%) of the air. In the second, related to the prediction of productive performance, the input variables were air... Tipo: Info:eu-repo/semantics/article Palavras-chave: Coturniculture; Fuzzy logic; Productivity; Environmental quality. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000400604 Desempenho socioambiental da integração lavoura-pecuária-floresta na Unidade de Referência Tecnológica Fazenda Boa Vereda. Infoteca-e BUSCHINELLI, C. C. de A.; REIS, C. A. F.; SANTOS, A. M.; PACHECO, A. R.; RODRIGUES, G. S.. Resumo: Dentre as principais inovações voltadas à intensificação sustentável da produção agropecuária, os sistemas de Integração Lavoura-Pecuária-Floresta (ILPF) têm se destacado, ao prover condições para ampliação e diversificação produtiva, com aproveitamento racional dos recursos naturais e eficiência no uso de insumos, conservação da qualidade ambiental, promoção da rentabilidade e da qualidade de vida dos produtores rurais. Na presente pesquisa, um estabelecimento de referência em ILPF foi analisado em relação à sustentabilidade, servindo de unidade demonstrativa do método Ambitec-Agro, das contribuições da adoção do sistema ILPF, e da possibilidade de realização de uma agropecuária sustentável. O trabalho detalha um amplo conjunto de aspectos e... Tipo: Folhetos Palavras-chave: Integração-lavoura-pecuária-floresta; ILPF; Qualidade sociambiental; Unidade de referência; Agrossilvicultura; Impacto Ambiental; Impacto Social; Agroforestry; Environmental quality; Environmental assessment. Ano: 2022 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1144182 Microbiological and chemical attributes of a Hapludalf soil with swine manure fertilization PAB Couto,Rafael da Rosa; Comin,Jucinei José; Soares,Cláudio Roberto Fonsêca Sousa; Belli Filho,Paulo; Benedet,Lucas; Moraes,Marcel Pires de; Brunetto,Gustavo; Beber,Caetano Luiz. The objective of this work was to evaluate the microbiological and chemical attributes of a soil with a seven‑year history of urea and swine manure application. In the period from October 2008 to October 2009, soil samples were collected in the 0-10 cm layer and were subjected to the treatments: control, without application of urea or manure; and with the application of urea, pig slurry, and deep pig litter in two doses, in order to supply one or two times the recommended N doses for the maize (Zea mays)/black oat (Avena strigosa) crop succession. The carbon of the microbial biomass (MB‑C) and the basal respiration (C‑CO2) were analyzed, and the metabolic (qCO2) and microbial quotient (qmic) were calculated with the obtained data. Organic matter, pH in... Tipo: Info:eu-repo/semantics/article Palavras-chave: Environmental quality; No‑tillage; Pig slurry; Soil quality; Swine production. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000700010 Agricultural Resources and Environmental Indicators, 2006 Edition AgEcon Wiebe, Keith D.; Gollehon, Noel R.. This is a large file. We have had reports of problems opening the file in Mozilla Firefox. If you have problems, try using Windows Internet Explorer. Tipo: Report Palavras-chave: ERS; AREI; Agricultural economics; Natural resources; Land; Land use; Land values; Land ownership; Water use; Irrigation; Water quality; Genetic resources; Biotechnology; Agricultural research; Agricultural productivity; Global resources; Soil conservation; Soil erosion; Pest management; Nutrient management; Animal agriculture; Organic agriculture; Conventional agriculture; Conservation policy; Land retirement; Working lands; Wetlands; Farmland protection; Environmental quality; Farm structure; Farm ownership; Farm management decisions; Farm business; Environmental Economics and Policy; Resource /Energy Economics and Policy. Ano: 2006 URL: http://purl.umn.edu/7207 Green Giving: An Analysis of Contributions to Major U.S. Environmental Groups AgEcon Richer, Jerrell. Data are compiled from the tax records of 29 major environmental organizations for the period 1980-1994 to identify factors that influence voluntary contributions. I examine the effects of organizational characteristics, such as fundraising expenditures and alternative sources of revenue, along with the impact of general economic conditions and the political climate. I find that government grants to the organizations had a positive and statistically significant impact on voluntary contributions rather than a crowding out effect. Contributions were price inelastic, where the price is defined as the effective cost to the donor of achieving a one-dollar increase in the provision of program services. Resources devoted to fundraising had a strong and positive... Tipo: Working or Discussion Paper Palavras-chave: Charitable giving; Conservation; Crowding out; Environmental quality; Fundraising; Nonprofit organizations; Public goods; Environmental Economics and Policy; Q0; H8. Ano: 1995 URL: http://purl.umn.edu/10870 THE ECONOMIC IMPORTANCE OF CROP ROTATION SYSTEMS: EVIDENCE FROM THE LITERATURE AgEcon Gebremedhin, Berhanu; Schwab, Gerald. Agricultural sustainability requires that the individual farm firm be competitive and profitable while simultaneously enhancing environmental quality and the natural resource base upon which the farm firm and agricultural economy depends. The reliance of conventional agriculture systems on purchased inputs external to the firm presents possible challenges to the long-term sustainability of the system. Crop rotation systems are one cropping system alternative that can reduce agriculture's dependence on external inputs through internal nutrient recycling, maintenance of the long-term productivity of the land, and breaking weed and disease cycles. Decision criteria to choose among competing crop rotation systems can include impact on soil quality and... Tipo: Working or Discussion Paper Palavras-chave: Agricultural sustainability; External inputs; Soil quality and fertility; Environmental quality; Crop rotations; Comparative economic analysis; Farm profitability.; Crop Production/Industries. Ano: 1998 URL: http://purl.umn.edu/11690 New Regulations Governing Concentrated Animal Feeding Operations Require New Solutions: Discussion AgEcon Fleming, Ronald A.; Thomas, Michael H.. This paper discusses the three invited papers presented in the session titled “New Regulations Require New Solutions: Federal Provisions Governing Concentrated Animal Feeding Operations” (i.e., CAFOs). These papers provide an excellent review of current state and federal laws and an excellent summary of what has been and is currently being done with respect to CAFO regulation. The papers present three different policy approaches: i) alternative performance standards, ii) location-specific regulation, and iii) insurance-based underwriting of CAFO discharges. Each approach has its drawbacks; however, blending theses suggested policies into current regulations would result in efficiency gains. Tipo: Journal Article Palavras-chave: Alternative performance standards; Animal Feeding Operations; Confined Animal Feeding Operations; Environmental quality; Insurance; Livestock; Manure management; Market-based incentives; Regulation; Spatial regulation; D81; K32; Q52; Q55; Q58. Ano: 2004 URL: http://purl.umn.edu/43349 Impact of High Crop Prices on Environmental Quality: A Case of Iowa and the Conservation Reserve Program AgEcon Secchi, Silvia; Babcock, Bruce A.. Growing demand for corn due to the expansion of ethanol has increased concerns that environmentally sensitive lands retired from agricultural production into the Conservation Reserve Program (CRP) will be cropped again. Iowa produces more ethanol than any other state in the United States, and it also produces the most corn. Thus, an examination of the impacts of higher crop prices on CRP land in Iowa can give insight into what we might expect nationally in the years ahead if crop prices remain high. We construct CRP land supply curves for various corn prices and then estimate the environmental impacts of cropping CRP land through the Environmental Policy Integrated Climate (EPIC) model. EPIC provides edge-of-field estimates of soil erosion, nutrient loss,... Tipo: Working or Discussion Paper Palavras-chave: Agricultural markets; Conservation Reserve Program; Environmental quality; Crop Production/Industries; Environmental Economics and Policy. Ano: 2007 URL: http://purl.umn.edu/9373 The Farmers' Plea to Environmentalists AgEcon Avery, Dennis T.. This paper critically examines linkages between alternative farming practices and environmental quality. Environmental impacts of high-yield farming are contrasted to those of low-yield farming. Traditional low-yield farming systems, while being promoted by environmental groups, have resulted in massive famine, higher cancer rates, soil erosion, and losses in wildlife habitat. Organic farming and other low-yield systems are land intensive and invade marginal farmland, thereby destroying wildlife habitat and biodiversity. Low-yield farming has not and cannot produce enough food to meet the food needs of the world’s population. By contrast, high-yield farming minimizes land use for food production and increase the availability of land for wildlife habitat... Tipo: Journal Article Palavras-chave: High-yield farming; Environmental quality; Wildlife habitat; Biodiversity; Population growth; Hunger; Free trade; Agricultural and Food Policy; Food Security and Poverty. Ano: 1996 URL: http://purl.umn.edu/90375 An Econometric Analysis of the Environmental Benefits Provided by the Conservation Reserve Program AgEcon Fleming, Ronald A.. Over $1.7 billion has been spent on the Conservation Reserve Program (CRP) since 1985. The purpose of this study is to show that these expenditures have aided the environment. Rather than quantify changes in environmental variables, a spatial econometric model is used to test if CRP enrollments are greater in counties with poorer environmental quality. In seven of nine regions, CRP enrollments are higher in counties with an environmental concern. This positive finding justifies past expenditures by the CRP and supports continued funding as an environmental program. The CRP is targeting current environmental concerns that will lead to future improvement. Tipo: Journal Article Palavras-chave: Conservation Reserve Program; Econometrics; Environmental quality; Soil erosion; Spatial data; Water quality; Wildlife habitat; Q28; Q58; C31; Q24; Q25. Ano: 2004 URL: http://purl.umn.edu/43388 The Conservation Reserve Program in the Presence of a Working Land Alternative: Implications for Environmental Quality, Program Participation, and Income Transfer AgEcon Feng, Hongli; Kling, Catherine L.; Kurkalova, Lyubov A.; Secchi, Silvia; Gassman, Philip W.. The United States has invested large sums of resources in multiple conservation programs for agriculture over the past century. In this paper we focus on the impacts of program interactions. Specifically, using an integrated economic and bio-physical modeling framework, we consider the impacts of the presence of working land programs on a land retirement for an important agricultural region—the Upper Mississippi River Basin (UMRB). Compared to a land retirement only program, we find that the presence of a working land program for conservation tillage results in significantly lower predicted signups for land retirement at a given rental rate. We also find that the presence of both a large working land and land retirement program can result in more... Tipo: Working or Discussion Paper Palavras-chave: Conservation Reserve Program; Conservation tillage; Environmental quality; Income transfer; Working land programs; Environmental Economics and Policy; Land Economics/Use. Ano: 2005 URL: http://purl.umn.edu/18630 NY Pollution Discharge Elimination Permits for CAFOs, Management Adjustments and the Environment AgEcon Enahoro, Dolapo K.; Schmit, Todd M.; Boisvert, Richard N.. Weakening demand for livestock and dairy produce, historically high prices for feed ingredients and increasingly strict regulations on animal waste management continue to put significant pressure on livestock and dairy operating margins. In this paper, we use representative farm mathematical programming models to analyze important linkages between farm management adjustments and changes in farm income due to recent changes in relevant agricultural prices and restrictions on land application of nutrients. We account explicitly for new restrictions on land application of nitrogen and phosphorus, and specifically applied to confined animal feeding operations (CAFOs). Our mathematical methods and the distinctive data available allows for the assessment of... Tipo: Conference Paper or Presentation Palavras-chave: CAFO regulations; Nutrient management; Manure disposal; Mathematical programming; Environmental quality; Environmental Economics and Policy; Farm Management; Production Economics. Ano: 2010 URL: http://purl.umn.edu/61143 Benefits of Protecting Rural Water Quality: An Empirical Analysis AgEcon Crutchfield, Stephen R.; Feather, Peter; Hellerstein, Daniel. Concerns about the impact of farm production on the quality of the Nation's drinking and recreational water resources have risen over the past 10 years. Because point sources of pollution were controlled first, agricultural nonpoint sources have become the Nation's largest remaining single water-quality problem. Both public and private costs of policies that address the conflict between agricultural production and water quality are relevant, but measuring the off-farm benefits and costs of changing water quality is difficult. Many of the values placed on these resources are not measured in traditional ways through market prices. This report explores the use of nonmarket valuation methods to estimate the benefits of protecting or improving rural water... Tipo: Report Palavras-chave: Water quality; Nonpoint source pollution; Environmental quality; Agricultural production; Costs; Benefits; Resource /Energy Economics and Policy. Ano: 1995 URL: http://purl.umn.edu/33949 Intraindustry Trade and the Environment: Is There a Selection Effect? AgEcon Aralas, Sarma B.; Hoehn, John P.. Replaced with revised version of paper 08/06/10. Tipo: Conference Paper or Presentation Palavras-chave: Environment; Trade; Monopolistic Competition; Selection effect; Environmental quality; Panel data; OECD; Pollution; Environmental Economics and Policy; International Development; International Relations/Trade; Q56; Q51; Q53; Q58; F12; F18. Ano: 2010 URL: http://purl.umn.edu/61367 Registros recuperados: 29 Primeira ... 1 2 ... Última

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