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	Provedor de dados AgEcon (4) Thai Agricultural (2) Colegio de Postgraduados (2) Autor Amnat Suwanarit (2) Bangsund, Dean A. (2) Chairerk Suwannarat (2) DeVuyst, Eric A. (2) Leistritz, F. Larry (2) Pérez Sandoval, Reyna (2) Bucholtz, Shawn (1) Claassen, Roger (1) Cooper, Joseph C. (1) Gueorguieva, Anna (1) Johansson, Robert C. (1) Lubowski, Ruben N. (1) Roberts, Michael J. (1) Sesmero, Juan P. (1) Sodsai Changsaluk (1) Traisuda Waitruadrok (1) Mais... Palavra-chave Soil productivity (8) Agribusiness (2) Corn (2) Crop Production/Industries (2) Cropping systems (2) Environmental Economics and Policy (2) Eucalyptus (2) Farm-gate price (2) Forest plantations (2) Forest soils (2) Forestal (2) Indice de sitio (2) Land Economics/Use (2) Legumes (2) Maestría (2) Maize (2) North Dakota (2) Plantaciones forestales (2) Production costs (2) Productividad (2) Mais... Tipo do documento Report (3) Conference Paper or Presentation (1) Ano 2011 (1) 2010 (2) 2008 (2) 2006 (1) 1987 (1) 1986 (1) Mais... País United States (4) Mexico (2) Thailand (2) Idioma Inglês (5) Espanhol (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 8 Primeira ... 1 ... Última Características edafológicas y potencial productivo de Eucalyptus urophylla y E. grandis en Huimanguillo, Tabasco. Colegio de Postgraduados Pérez Sandoval, Reyna. Este trabajo se realizó en plantaciones establecidas por la empresa Forestaciones Operativas Mexicanas (FOMEX), en el Municipio de Huimanguillo, Tabasco, con la finalidad de encontrar relaciones entre variables del suelo superficial (0-20 y 20-40cm) y el crecimiento de plantaciones de Eucalyptus urophylla y E. grandis. Como índice de crecimiento se utilizó índice de sitio (IS) y las variables edáficas estudiadas fueron: pH, materia orgánica, fósforo extractable, los cationes intercambiables: K, Ca y Mg. También se consideró la capacidad de intercambio catiónico, porcentaje de saturación de bases, porcentaje de saturación de aluminio, densidad aparente, nitrógeno total, capacidad de retención de humedad a capacidad de campo y textura. Se colectaron... Palavras-chave: Plantaciones forestales; Suelo; Productividad; Eucalyptus; Indice de sitio; Forest plantations; Forest soils; Soil productivity; Eucalyptus; Site index; Maestría; Forestal. Ano: 2010 URL: http://hdl.handle.net/10521/190 Características edafológicas y potencial productivo de Eucalyptus urophylla y E. grandis en Huimanguillo, Tabasco. Colegio de Postgraduados Pérez Sandoval, Reyna. Este trabajo se realizó en plantaciones establecidas por la empresa Forestaciones Operativas Mexicanas (FOMEX), en el Municipio de Huimanguillo, Tabasco, con la finalidad de encontrar relaciones entre variables del suelo superficial (0-20 y 20-40cm) y el crecimiento de plantaciones de Eucalyptus urophylla y E. grandis. Como índice de crecimiento se utilizó índice de sitio (IS) y las variables edáficas estudiadas fueron: pH, materia orgánica, fósforo extractable, los cationes intercambiables: K, Ca y Mg. También se consideró la capacidad de intercambio catiónico, porcentaje de saturación de bases, porcentaje de saturación de aluminio, densidad aparente, nitrógeno total, capacidad de retención de humedad a capacidad de campo y textura. Se colectaron... Palavras-chave: Plantaciones forestales; Suelo; Productividad; Eucalyptus; Indice de sitio; Forest plantations; Forest soils; Soil productivity; Eucalyptus; Site index; Maestría; Forestal. Ano: 2010 URL: http://hdl.handle.net/10521/190 Cumulative effects of cropping systems involving corn and legumes on the yields of the twelvth-year crops Thai Agricultural Amnat Suwanarit; Chairerk Suwannarat; Sodsai Changsaluk. 3 tables Palavras-chave: Corn; Maize; Legumes; Soybeans; Peanuts; Cropping systems; Corn-legume rotation; Soil productivity; Fertilizers; ข้าวโพด; ถั่ว; ระบบการปลูกพืช; ปุ๋ย; ผลผลิต. Ano: 1987 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4250 ENVIRONMENTAL EFFECTS OF AGRICULTURAL LAND-USE CHANGE: THE ROLE OF ECONOMICS AND POLICY AgEcon Lubowski, Ruben N.; Bucholtz, Shawn; Claassen, Roger; Roberts, Michael J.; Cooper, Joseph C.; Gueorguieva, Anna; Johansson, Robert C.. This report examines evidence on the relationship between agricultural land-use changes, soil productivity, and indicators of environmental sensitivity. If cropland that shifts in and out of production is less productive and more environmentally sensitive than other cropland, policy-induced changes in land use could have production effects that are smaller-and environmental impacts that are greater-than anticipated. To illustrate this possibility, this report examines environmental outcomes stemming from landuse conversion caused by two agricultural programs that others have identified as potentially having important influences on land use and environmental quality: Federal crop insurance subsidies and the Conservation Reserve Program (CRP), the Nation's... Tipo: Report Palavras-chave: Conservation Reserve Program (CRP); Crop insurance; Erosion; Extensive margin; Farm policy; Imperiled species; Land use; Land-use change; Land quality; Nutrient loss; Soil productivity; Environmental Economics and Policy; Land Economics/Use. Ano: 2006 URL: http://purl.umn.edu/33591 Evaluation of Breakeven Farm-gate Switchgrass Prices in South Central North Dakota AgEcon Bangsund, Dean A.; DeVuyst, Eric A.; Leistritz, F. Larry. Switchgrass, a warm-season perennial grass, native to the region, has received considerable interest for its potential role as a dedicated feedstock for cellulosic-based bio-fuels. This research examined the farm-gate price needed for switchgrass to provide per-acre net returns equal to those obtained from traditional crops in south central North Dakota. Future production costs for switchgrass and net returns from traditional crops were estimated for three soil productivity classes and also were developed to reflect the historical revenue and cost patterns associated with producers who are typically more or less profitable (i.e., average net return per acre) than regional averages. Prices were calculated using an annualized equivalent analysis of... Tipo: Report Palavras-chave: Switchgrass; Production costs; Farm-gate price; North Dakota; Soil productivity; Agribusiness; Crop Production/Industries; Production Economics. Ano: 2008 URL: http://purl.umn.edu/37845 Evaluation of Breakeven Farm-gate Switchgrass Prices in South Central North Dakota-Summary AgEcon Bangsund, Dean A.; DeVuyst, Eric A.; Leistritz, F. Larry. Switchgrass, a warm-season perennial grass, native to the region, has received considerable interest for its potential role as a dedicated feedstock for cellulosic-based bio-fuels. This research examined the farm-gate price needed for switchgrass to provide per-acre net returns equal to those obtained from traditional crops in south central North Dakota. Future production costs for switchgrass and net returns from traditional crops were estimated for three soil productivity classes and also were developed to reflect the historical revenue and cost patterns associated with producers who are typically more or less profitable (i.e., average net return per acre) than regional averages. Prices were calculated using an annualized equivalent analysis of... Tipo: Report Palavras-chave: Switchgrass; Production costs; Farm-gate price; North Dakota; Soil productivity; Agribusiness; Crop Production/Industries. Ano: 2008 URL: http://purl.umn.edu/42253 Productivity of Pak Chong soil after ten-year applications with NP-fertilizer and corn-legume cropping systems Thai Agricultural Amnat Suwanarit; Chairerk Suwannarat; Traisuda Waitruadrok. Palavras-chave: Corn; Maize; Legumes; Cropping systems; NP fertilizers; Pak Chong soil; Soil productivity; ข้าวโพด; ผลผลิต; ระบบการปลูกพืช; ปุ๋ยไนโตรเจน; ปุ๋ยฟอสฟอรัส. Ano: 1986 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4399 Sustainability of Corn Stover Harvest for Biomass AgEcon Sesmero, Juan P.. Off-farm demand for crop residues is expected to grow as bioenergy policies become effective. Demand for residues will provide farmers with an additional source of revenue but it may also trigger losses in soil organic carbon and increases in fertilizer application. This study develops a dynamic economic model of stover harvest that permits conceptualization and quantification of these potential tradeoffs. We parameterize our model based on publicly available studies of soil biophysical relationships in the Corn Belt. Under these parameter values and 2010 corn and fertilizer prices harvesting stover is not economically convenient at prices below $53 per dry ton of stover. Results suggest that the rate of stover harvest may be quite sensitive and negatively... Tipo: Conference Paper or Presentation Palavras-chave: Stover supply; Biomass; Soil productivity; Soil organic carbon; Nitrogen; Environmental Economics and Policy; Farm Management; Land Economics/Use; Resource /Energy Economics and Policy; C61; Q12; Q24; Q42; Q53. Ano: 2011 URL: http://purl.umn.edu/103765 Registros recuperados: 8 Primeira ... 1 ... Última

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