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Registros recuperados: 9
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Cost Analysis of Alternative Harvest and Storage Methods for Switchgrass in the Southeastern U.S. AgEcon
Larson, James A.; Mooney, Daniel F.; English, Burton C.; Tyler, Donald D..
This study evaluated the potential impacts of dry matter losses from alternative harvest and storage methods on the costs of growing switchgrass for energy production. Data from a switchgrass bale harvest and storage experiment at Milan, TN, indicate that storage losses for covered rectangular bales were greater than for covered round bales. In addition, the cost of delivered feedstock increased with longer storage times because of larger dry matter losses. Even though storage losses were higher with uncovered large round bales, production costs were the lowest because costs of storage were minimal compared to other storage methods.
Tipo: Conference Paper or Presentation Palavras-chave: Bioenergy; Dry matter loss; Storage; Production Economics; D20; D21; D81; D86; Q13; Q42; P42.
Ano: 2010 URL: http://purl.umn.edu/56518
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Economic Analysis of the Effects of Winter Cover Crops on No-Tillage Corn Yield Response to Fertilizer Nitrogen AgEcon
Roberts, Roland K.; Larson, James A.; Tyler, Donald D.; Duck, Bob N.; Dillivan, Kim D..
Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries.
Ano: 1997 URL: http://purl.umn.edu/35851
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Effects of Alternative Lime Application Rates on Cotton Profitability with Varying Cover Crops, Nitrogen, and Tillage Methods. AgEcon
Cochran, Rebecca L.; Larson, James A.; Roberts, Roland K.; Tyler, Donald D..
Soil acidity and cotton yields are influenced by cover crop, nitrogen, and tillage method. Applying half the recommended lime rate may be possible without reducing cotton yields. Using a nitrogen intensive cover crop and applying less nitrogen should mitigate the effects on soil acidity and yields.
Tipo: Conference Paper or Presentation Palavras-chave: Cover crops; Cotton; Lime; Nitrogen; Profitability; Soil acidity; Tillage; Crop Production/Industries.
Ano: 2005 URL: http://purl.umn.edu/35569
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Estimating the Impacts of Storage Dry Matter Losses on Switchgrass Production AgEcon
Larson, James A.; Mooney, Daniel F.; English, Burton C.; Tyler, Donald D..
This poster estimates dry matter losses as a function of harvest method, storage treatment, and time in storage. We then calculate the cost to store switchgrass bales under alternate harvest method and storage treatment scenarios; and determine the breakeven harvest method and storage treatment as a function of biomass price and time in storage.
Tipo: Conference Paper or Presentation Palavras-chave: Biomass; Bioenergy crops; Function form; Sustainable systems; Farm Management; Production Economics; Q10; Q42.
Ano: 2010 URL: http://purl.umn.edu/61530
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Is Switchgrass Yield Response to Nitrogen Fertilizer Dynamic? Implications for Profitability and Sustainability at the Farm Level AgEcon
Mooney, Daniel F.; Roberts, Roland K.; English, Burton C.; Larson, James A.; Tyler, Donald D..
Revised version of the paper submitted 2/11/2010
Tipo: Conference Paper or Presentation Palavras-chave: Biomass; Energy Crops; Sequential Inputs; West Tennessee; Crop Production/Industries; Farm Management; Production Economics; Resource /Energy Economics and Policy.
Ano: 2010 URL: http://purl.umn.edu/57623
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NITROGEN-FIXING WINTER COVER CROPS AND PRODUCTION RISK: A CASE STUDY FOR NO-TILLAGE CORN AgEcon
Larson, James A.; Roberts, Roland K.; Tyler, Donald D.; Duck, Bob N.; Slinsky, Stephen P..
Winter legumes can substitute for applied nitrogen fertilization of corn. Stochastic dominance was used to order net revenues from legume and applied nitrogen alternatives. Stochastic dominance orderings indicate that systems combining vetch with low applied nitrogen fertilization (50 and 100 pounds/acre, respectively) were risk inefficient. By contrast, vetch and 150 pounds/acre applied nitrogen maximized expected net revenue and was risk efficient for a wide range of risk-averse and risk-seeking behavior. Farmers with these risk attitudes may not reduce applied nitrogen if they switch to a vetch cover. Extremely risk-averse or risk-seeking farmers would not prefer winter legumes.
Tipo: Journal Article Palavras-chave: Legume winter crops; Nitrogen; Risk premiums; Stochastic dominance; Crop Production/Industries.
Ano: 1998 URL: http://purl.umn.edu/15098
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RISK EFFECTS OF ALTERNATIVE WINTER COVER CROP, TILLAGE, AND NITROGEN FERTILIZATION SYSTEMS IN COTTON PRODUCTION AgEcon
Larson, James A.; Jaenicke, Edward C.; Roberts, Roland K.; Tyler, Donald D..
A Just-Pope model was developed to assess tillage, nitrogen, weather, and pest effects on risk for cotton grown after alternative winter cover crops. Yield risk for cotton after hairy vetch was less than for cotton with no winter cover when no nitrogen fertilizer was used to supplement the vetch nitrogen. However, because cotton after vetch has a higher production cost, farmers growing conventionally tilled cotton may be slow to adapt because risk-return tradeoffs may be unacceptable under risk neutrality and risk aversion. For risk-averse farmers who have already adopted no tillage, cotton grown after hairy vetch is risk efficient.
Tipo: Journal Article Palavras-chave: Cover crops; Just-Pope production function; Risk; Tillage; Crop Production/Industries.
Ano: 2001 URL: http://purl.umn.edu/15458
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Switchgrass Production in Marginal Environments: A Comparative Economic Analysis across Four West Tennessee Landscapes AgEcon
Mooney, Daniel F.; Roberts, Roland K.; English, Burton C.; Tyler, Donald D.; Larson, James A..
Switchgrass (Panicum virgatum L.) has been identified as a model feedstock for the emerging biofuels industry. Its selection was based, in part, upon the observation that switchgrass can produce high yields in marginal production environments. This trait may become particularly valuable in coming years, as renewable fuel mandates begin to take effect and concerns over the food-versus-fuel debate increase. Relatively little research information exists about how management practices and production costs vary across different production environments. The objectives of this research were (a) to compare switchgrass yields as influenced by seeding rate and nitrogen fertilization rates in low-, intermediate-, and high-yielding switchgrass production environments,...
Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries; International Relations/Trade.
Ano: 2008 URL: http://purl.umn.edu/6403
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VARIABLE RATE NITROGEN APPLICATION ON CORN FIELDS: THE ROLE OF SPATIAL VARIABILITY AND WEATHER AgEcon
Roberts, Roland K.; Mahajanashetti, S.B.; English, Burton C.; Larson, James A.; Tyler, Donald D..
Meta-response functions for corn yields and nitrogen losses were estimated from EPIC-generated data for three soil types and three weather scenarios. These metamodels were used to evaluate variable rate (VRT) versus uniform rate (URT) nitrogen application technologies for alternative weather scenarios and policy option. Except under very dry conditions, returns per acre for VRT were higher than for URT and the economic advantage of VRT increased as realized rainfall decreased from expected average rainfall. Nitrogen losses to the environment from VRT were lower for all situation examined, except on fields with little spatial variability.
Tipo: Journal Article Palavras-chave: Corn; Environment; Meta-response functions; Nitrogen restriction; Precision farming; Site-specific management; Spatial variability; Weather variability; Crop Production/Industries.
Ano: 2002 URL: http://purl.umn.edu/15512
Registros recuperados: 9
Primeira ... 1 ... Última
 

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