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| Registros recuperados: 19 | |
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| Pruitt, J. Ross; Gillespie, Jeffrey M.; Nehring, Richard F.; Qushim, Berdikul. |
| Using USDA’s Agricultural Resource Management Survey data, factors leading to the adoption of technology, management practices, and production systems by U.S. beef cow-calf producers are analyzed. Binary logit regression models are used to determine impacts of vertical integration; region of the U.S.; farm size, diversification, and tenure; and demographics on adoption decisions. Significant differences were found in adoption rates by region of the U.S., degree of vertical integration, and size of operation, suggesting the presence of economies of size and vertical economies of scope. Results also indicate high degrees of complementarity among technologies, management practices, and production systems. |
| Tipo: Article |
Palavras-chave: Cattle; Cow-calf; Management practices; Production systems; Technology adoption; Farm Management; D21; Q12; Q16. |
| Ano: 2012 |
URL: http://purl.umn.edu/123778 |
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| MENDES,Joana Maia; DAIRIKI,Jony Koji; INOUE,Luis Antonio Kioshi Aoki; JESUS,Rogério Souza de. |
| Abstract Tambaqui is the main fish species farmed in the Amazon. It is produced on industrial scale, slaughtered in the field, primarily by post-harvest asphyxia. This procedure, however, is stressful because it depletes energy reserves that should be used in postmortem metabolism, which may compromise fish meat freshness and quality. The present study compared the quality of tambaquis slaughtered by asphyxia, the conventional industrial method, and hypothermia. Tambaquis weighing around 1.6 kg were harvested from dugout ponds, transported to experimental tanks and allowed to recover from transport stress for 48h. Biological parameters of fish were evaluated alive post- harvest (Harv), transport (Tr) and recovery (Rc), and postmortem analysis was performed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stress; Management practices; Fish processing. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612017000300383 |
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| Borie,Fernando; Rubio,Rosa; Morales,Alfredo; Curaqueo,Gustavo; Cornejo,Pablo. |
| Arbuscular mycorrhizal (AM) association plays a key role in the sustainability of terrestrial plant ecosystems, in particular those presenting limitations for the establishment and subsequent growth of plants. In Chile, more than 50% of arable soils are originated from volcanic ashes, showing in general several constraints to crop production, such as low pH, high exchangeable aluminum content and low levels of available P. Under these conditions, the management of AM fungal propagules using adequate cultural management practices emerges as a successful alternative in order to maximize the positive effects of AM symbiosis on plant growth in these types of soil. This review presents the results of several years of research about the effect of different... |
| Tipo: Journal article |
Palavras-chave: Andisol; Management practices; Mycorrhizal propagules; N sources; P fractions; Ultisol. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162010000100001 |
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| Silva,Laércio S.; Galindo,Izabel C. de L.; Gomes,Romário P.; Campos,Milton C. C.; Souza,Edivan R. de; Cunha,José M. da. |
| ABSTRACT Inadequate and intensive management of soils can promote changes in their chemical attributes and impair the quality of surface and groundwater, especially in hillside areas. Therefore, the aim of this study was to identify possible changes in soil and water chemical composition of hillside areas cultivated with horticulture. For this, chemical attributes of three soil depths (0-10, 10-30, and 30-60 cm) were determined in three hillside positions (upper, middle, and lower thirds) of five hillside and adjacent forest areas, as well as water from reservoirs for agricultural use and human consumption. Compared with the forest area, horticultural areas present soil with lower organic matter content and CEC, but higher values of pH, base saturation,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Landscape; Environmental contamination; Management practices; Irrigation water. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000300351 |
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| Ribaudo, Marc; Ghosh, Gaurav S.; Shortle, James S.. |
| The Environmental Protection Agency and the U.S. Department of Agriculture are promoting point/nonpoint trading as a way of reducing the costs of meeting water quality goals while giving nonpoint sources a larger role in meeting those goals. Farms can create offsets or credits in a point/nonpoint trading program by implementing management practices such as conservation tillage, nutrient management, and buffer strips. To be eligible to sell credits, farmers must first comply with baseline requirements. The EPA defines a baseline as the pollutant control requirements that apply to a seller in the absence of trading. EPA guidance recommends that the baseline for nonpoint sources be management practices that are consistent with the water quality goal. A... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Nonpoint pollution; Emissions trading; Management practices; Environmental Economics and Policy. |
| Ano: 2009 |
URL: http://purl.umn.edu/49258 |
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| Abrego Hernández, Rafael. |
| El objetivo del trabajo fue analizar el sistema de producción y las poblaciones de cabras criollas para definir el morfotipo existente de la Mixteca Poblana. El trabajo se realizó en los municipios de Tecomatlán, Tehuitzingo, Piaxtla, Chinantla, Tulcingo de Valle y Acatlán de Osorio, Puebla. Para la caracterización del sistema de producción caprino se aplicó una encuesta a 100 productores para registrar información del perfil del productor, rebaño, infraestructura, alimentación, mejora genética, sanidad y comercialización. A una población de 1290 cabras, se les registró información faneróptica y zoométrica. La información se analizó para obtener estadísticos descriptivos, discriminantes canónicos y componentes principales. La edad de los productores fue de... |
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Palavras-chave: Cabra colorada; Manejo de cabras; Medidas zoométricas; Perfil del productor; Peso vivo; Body traits; Goat farmer's profile; Live weight; Management practices; Reddish goats; Desarrollo y Gestión de Sistemas Ganaderos; Maestría Tecnológica. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/2204 |
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| East, Miriam. |
| In the Mackay Whitsunday region, the dominant grazing based operations are small intensive systems that heavily utilise soil, nutrient and chemical management practices. To improve water quality entering the Great Barrier Reef, graziers are being encouraged to adopt improved management practices. However, while there is good understanding of the management changes required to reach improved practice classification levels, there is poor understanding of the likely economic implications for a grazier seeking to move from a lower level classification to the higher level classifications. This paper provides analysis of the costs and benefits associated with adoption of intensive grazing best management practices to determine the effect on the profitability and... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Grazing; Management practices; Incentives; Mackay Whitsunday; Farm Management. |
| Ano: 2010 |
URL: http://purl.umn.edu/59070 |
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| Johnson, Rachel J.; Doye, Damona G.; Lalman, David L.; Peel, Derrell S.; Raper, Kellie Curry; Chung, Chanjin. |
| Binary logit regression models were used to estimate factors affecting adoption of recommended management practices. Variables analyzed include aspects of farm structure, human capital, farm objectives, and production system employed by the producer. Results reveal that operation size and dependency upon income from the stocker operation, in particular, influence the adoption of recommended practices. Older producers and those pursuing a year-round production strategy were found to lag in adoption. |
| Tipo: Journal Article |
Palavras-chave: Beef production; Logit; Management practices; Stocker cattle; Agribusiness; Farm Management; Industrial Organization; Labor and Human Capital; Livestock Production/Industries; Q12; Q16. |
| Ano: 2010 |
URL: http://purl.umn.edu/57153 |
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| Díaz Sánchez, Jesús Ranulfo. |
| Con el objetivo de analizar los factores que inciden en la salud de las ovejas en los sistemas extensivos de Huamantla, Tlaxcala, se entrevistaron a 54 productores de ovinos para registrar información de las medidas de bioseguridad en las explotaciones. Los datos se analizaron con estadística descriptiva, clasificación de árbol, regresión lineal y logística, usando el paquete estadístico SAS y SPSS. Los rebaños son pequeños (47.8±39 cabezas), uso de mano de obra familiar (100%) y pastoreo en agostadero y rastrojeras. Para el control de enfermedades se utilizan medicinas (89.1%), registro de enfermedades (92.5%), uso de ropa exclusiva en la explotación (29.6%), asesoría profesional (27.8%) e higiene del personal (20.3%). Son menos frecuente el uso de... |
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Palavras-chave: Manejo; Ovinos; Prevención de enfermedades; Rebaños sanidad; Health; Management practices; Prevention of diseases; Sheep flock; Desarrollo y Gestión de Sistemas Ganaderos; Maestría Tecnológica. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/1832 |
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| Cerri,Carlos Eduardo P.; Sparovek,Gerd; Bernoux,Martial; Easterling,Willian E.; Melillo,Jerry M.; Cerri,Carlos Clemente. |
| The intensive land use invariably has several negative effects on the environment and crop production if conservative practices are not adopted. Reduction in soil organic matter (SOM) quantity means gas emission (mainly CO2, CH4, N2O) to the atmosphere and increased global warming. Soil sustainability is also affected, since remaining SOM quality changes. Alterations can be verified, for example, by soil desegregation and changes in structure. The consequences are erosion, reduction in nutrient availability for the plants and lower water retention capacity. These and other factors reflect negatively on crop productivity and sustainability of the soil-plant-atmosphere system. Conversely, adoption of "best management practices", such as conservation tillage,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazil; Climate change; Greenhouse effect; Soil organic matter; Management practices. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000100013 |
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| Jha, Manoj K.; Arnold, Jeffrey G.; Gassman, Philip W.. |
| The Raccoon River Watershed (RRW) in West-Central Iowa has been recognized as exporting some of the highest nitrate-nitrogen loadings in the United States and is a major source of sediment and other nutrient loadings. An integrated modeling framework has been constructed for the RRW that consists of the Soil and Water Assessment Tool (SWAT) model, the interactive SWAT (i_SWAT) software package, Load Estimator (LOADEST) computer program, and other supporting software and databases. The simulation framework includes detailed land use and management data such as different crop rotations and an array of nutrient and tillage management schemes, derived from the U.S. Department of Agriculture's National Resources Inventory databases and other sources. This paper... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Calibration; Management practices; Raccoon River Watershed; SWAT; Resource /Energy Economics and Policy. |
| Ano: 2006 |
URL: http://purl.umn.edu/18455 |
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| Registros recuperados: 19 | |
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