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	Provedor de dados AgEcon (44) Autor Epplin, Francis M. (44) Brorsen, B. Wade (9) Kaitibie, Simeon (5) Biermacher, Jon T. (4) Haque, Mohua (4) Horn, Gerald W. (4) Taliaferro, Charles M. (4) Aravindhakshan, Sijesh C. (3) Doye, Damona G. (3) Duke, Jason C. (3) Hossain, Ishrat (3) Huhnke, Raymond L. (3) Hwang, Seonghuyk (3) Krenzer, Eugene G., Jr. (3) Mapemba, Lawrence D. (3) Peeper, Thomas F. (3) Solie, John B. (3) Taylor, Karen W. (3) Tembo, Gelson (3) Vitale, Jeffrey D. (3) Mais... Palavra-chave Crop Production/Industries (25) Resource /Energy Economics and Policy (10) Q12 (7) Farm Management (5) Land Economics/Use (5) Production Economics (5) Q10 (5) Switchgrass (5) Wheat (5) Livestock Production/Industries (4) Mathematical programming (4) Q42 (4) Agricultural and Food Policy (3) Ethanol (3) Research and Development/Tech Change/Emerging Technologies (3) Risk and Uncertainty (3) Agribusiness (2) Biomass (2) Cellulosic (2) Contract duration (2) Mais... Tipo do documento Conference Paper or Presentation (33) Journal Article (8) Article (1) Presentation (1) Working or Discussion Paper (1) Ano 2012 (1) 2011 (2) 2010 (5) 2009 (2) 2008 (5) 2007 (4) 2006 (6) 2005 (3) 2004 (4) 2003 (7) 2002 (1) 2000 (1) 1999 (2) 1997 (1) Mais... País United States (44) Idioma Inglês (44)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 44 Primeira ... 1 2 3 ... Última Managing Expected Switchgrass Biomass Yield Variability by Strategically Selecting Land to Lease AgEcon Debnath, Deepayan; Stoecker, Arthur L.; Epplin, Francis M.. Biorefineries that plan to use switchgrass exclusively will have to account for year-to-year variability in feedstock production. The objective of this research is to determine the quantity, class, and location of land to lease for switchgrass production to provide for the needs of a biorefinery. The firm could elect to lease land based on average switchgrass yields or to lease to attempt to insure that even in the worst case (based on historical data) production year the area leased will produce sufficient feedstock to fully provide for the needs of the biorefinery. EPIC was used to generate empirical distributions of switchgrass biomass yields for three land classes for each of 30 counties. Mathematical programming was used to address the objectives and... Tipo: Presentation Palavras-chave: EPIC; Mathematical programming; Switchgrass; Yield variability; Crop Production/Industries; Land Economics/Use; Risk and Uncertainty; Q42; Q12. Ano: 2012 URL: http://purl.umn.edu/124230 Risk Efficient Strategies for Using Winter Wheat Pasture AgEcon Taylor, Karen W.; Epplin, Francis M.; Peel, Derrell S.. Replaced with revised version of paper 08/31/06. Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries; Risk and Uncertainty. Ano: 2006 URL: http://purl.umn.edu/35393 Contract Duration and the Division of Labor in Agricultural Land Leases AgEcon Yoder, Jonathan K.; Hossain, Ishrat; Epplin, Francis M.; Doye, Damona G.. Short-term contracts provide weak incentives for durable input investment if post-contract asset transfer is difficult. Our model shows that when both agents provide inputs, optimal contract length balances weak incentives of one agent against the other. This perspective broadens the existing contract duration literature, which emphasizes the tradeoff between risk sharing and contract costs. We develop hypotheses and test them based on private grazing contracts from the Southern Great Plains. We find broad support for the implications of our model. For example, landowners provide durable land-specific inputs more often under annual versus multiyear contracts. Tipo: Working or Discussion Paper Palavras-chave: Land lease contracts; Moral hazard; Contract duration; Division of labor; Labor and Human Capital; Land Economics/Use; J43; L23; Q15. Ano: 2005 URL: http://purl.umn.edu/12962 Optimal Grazing Termination Date for Dual-Purpose Winter Wheat Production AgEcon Taylor, Karen W.; Epplin, Francis M.; Brorsen, B. Wade; Fieser, Brian G.; Horn, Gerald W.. Dual-purpose winter wheat (fall-winter forage plus grain) production is an important economic enterprise in the southern Great Plains. Grazing termination to enable grain production is a critical decision. The objective is to determine the optimal grazing termination date for dual-purpose wheat. The value of knowing the occurrence of first hollow stem (FHS), a wheat growth threshold for grazing termination, is also determined. Results indicate that for most price situations grazing should be terminated at or before FHS. Marginal wheat returns from extended grazing were negative and the value of FHS information ranges from $1.50 to $10 per acre. Tipo: Journal Article Palavras-chave: Dual-purpose; First hollow stem; Plateau function; Stocker cattle; Value of information; Wheat; Agribusiness; Agricultural Finance; Crop Production/Industries; Farm Management; Land Economics/Use; Livestock Production/Industries; Production Economics; Q12; Q16. Ano: 2010 URL: http://purl.umn.edu/57148 Maximum Value of a Precise Nitrogen Application System for Wheat AgEcon Biermacher, Jon T.; Epplin, Francis M.; Brorsen, B. Wade; Solie, John B.; Raun, William R.. Research is ongoing to develop sensor-based systems to determine crop nitrogen needs. The objective is to determine the expected maximum value of an in season precision nitrogen application system for winter wheat. Farmers could not afford to pay much more than $9 per acre for a precision system. Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries. Ano: 2006 URL: http://purl.umn.edu/35391 AJAE Appendix: Challenges to the Development of a Dedicated Energy Crop AgEcon Epplin, Francis M.; Clark, Christopher D.; Roberts, Roland K.; Hwang, Seonghuyk. The material contained herein is supplementary to the article named in the title and published in the American Journal of Agricultural Economics, Volume 89, Number 5, December 2007. Tipo: Journal Article Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies. Ano: 2007 URL: http://purl.umn.edu/7072 Precision Nitrogen Fertilization Technology with Micro Grids AgEcon Biermacher, Jon T.; Epplin, Francis M.; Brorsen, B. Wade; Solie, John B.; Raun, Bill. Sensor-based precision fertilizer technologies are being developed and researched by production scientists. One such technology uses normalized difference vegetation index (NDVI) reflectance measurements of growing winter wheat plants and a nitrogen fertilizer optimization algorithm (NFOA) to determine nitrogen requirement necessary for plants to reach their yield plateau. A number of precision fertilizer application systems that use this technology are considered in this paper. A linear response stochastic plateau wheat yield function conditional on NDVI reflectance measurements is estimated and used within an expected profit-maximization framework to estimate upper bounds on the returns from the precision nitrogen application systems. The on-the-go... Tipo: Conference Paper or Presentation Palavras-chave: Research and Development/Tech Change/Emerging Technologies. Ano: 2006 URL: http://purl.umn.edu/21046 Yield and Production Costs for Three Potential Dedicated Energy Crops in Mississippi and Oklahoma Environments AgEcon Busby, David P.; Little, Randall D.; Shaik, Saleem; Martins, Angelina; Epplin, Francis M.; Hwang, Seonghuyk; Baldwin, Brian S.; Taliaferro, Charles M.. The objective of this paper is to determine production costs of switchgrass, eastern gammagrass, and giant miscanthus using Mississippi and Oklahoma data. Production costs were computed using a standard enterprise budgeting approach by species and method of harvest. Results indicate cost difference across species and method of harvest. Tipo: Conference Paper or Presentation Palavras-chave: Yield and Cost; Biomass species; Crop Production/Industries; Resource /Energy Economics and Policy. Ano: 2007 URL: http://purl.umn.edu/34854 Integrative Investment Appraisal of a Lignocellulosic Biomass-to-Ethanol Industry AgEcon Tembo, Gelson; Epplin, Francis M.; Huhnke, Raymond L.. While theoretically more efficient than starch-based ethanol production systems, conversion of lignocellulosic biomass to ethanol is not without major challenges. A multi-region, multi-period, mixed integer mathematical programming model encompassing alternative feedstocks, feedstock production, delivery, and processing is developed. The model is used to identify key cost components and potential bottlenecks, and to reveal opportunities for reducing costs and prioritizing research. The research objective was to determine for specific regions in Oklahoma the most economical source of lignocellulosic biomass, timing of harvest and storage, inventory management, biorefinery size, and biorefinery location, as well as the breakeven price of ethanol, for a... Tipo: Journal Article Palavras-chave: Biomass; Biorefinery location; Ethanol; Integrative investment appraisal; Logistics; Mixed integer programming; Resource /Energy Economics and Policy. Ano: 2003 URL: http://purl.umn.edu/31070 DERIVATION AND OPTIMIZATION OF A STOCHASTIC LIVESTOCK WEIGHT GAIN RESPONSE TO STOCKING DENSITY MODEL AgEcon Kaitibie, Simeon; Epplin, Francis M.; Brorsen, B. Wade; Horn, Gerald W.; Krenzer, Eugene G., Jr.; Paisley, Steven I.. Dual-purpose winter wheat production is an important economic enterprise in the southern Great Plains of the United States. Because of the complex interactions involved in producing wheat grain and beef gain from a single crop, stocking density is an important decision. The objective of the research is to determine the stocking density that maximizes expected net returns from dual-purpose winter wheat production. Statistical tests rejected a conventional linear-response plateau function in favor of a linear-response stochastic plateau function. The optimal stocking density of 1.48 steers per hectare (0.60 steers per acre) is 19% greater with a stochastic plateau than with a nonstochastic one. Tipo: Conference Paper or Presentation Palavras-chave: Livestock Production/Industries. Ano: 2002 URL: http://purl.umn.edu/36538 Moral hazard and the division of labor in agricultural land leases AgEcon Hossain, Ishrat; Yoder, Jonathan K.; Epplin, Francis M.; Doye, Damona G.. Tipo: Conference Paper or Presentation Palavras-chave: Land lease contracts; Moral hazard; Contract duration; Division of labor; Land Economics/Use. Ano: 2004 URL: http://purl.umn.edu/59366 LIGNOCELLULOSIC BIOMASS HARVEST AND DELIVERY COST. AgEcon Mapemba, Lawrence D.; Epplin, Francis M.. The logistics of providing an orderly flow of lignocellulosic feedstock to a biorefinery have not been addressed by most biorefinery feasibility studies. A mixed integer mathematical programming model is developed that includes integer decision variables enabling investment in harvest machines that provide monthly harvest capacity based upon expected harvest days. Tipo: Conference Paper or Presentation Palavras-chave: Resource /Energy Economics and Policy. Ano: 2004 URL: http://purl.umn.edu/34730 Optimal Switchgrass Harvest Strategies Accounting for Yield and Nitrogen Requirement Differences by Month of Harvest AgEcon Haque, Mohua; Epplin, Francis M.. Extending switchgrass harvest over many months would require a smaller investment in harvest machines, but would result in a lower average harvestable yield per acre and would require more nitrogen fertilizer, less land for storage, and more land for growing switchgrass. A model was constructed and solved to determine the optimal strategy. Tipo: Conference Paper or Presentation Palavras-chave: Biofuel; Cellulosic; Ethanol; Harvest; Mathematical programming; Nitrogen; Switchgrass; Crop Production/Industries; Resource /Energy Economics and Policy; Q10; Q42. Ano: 2010 URL: http://purl.umn.edu/56435 ECONOMIES OF SIZE OF A COORDINATED BIOREFINERY FEEDSTOCK HARVEST SYSTEM AgEcon Thorsell, Sara; Epplin, Francis M.; Huhnke, Raymond L.. The objective of this research is to determine the cost to harvest lignocellulosic biomass, such as crop residue and perennial grasses, for use as biorefinery feedstock, and to determine the potential economies of size that might result from a coordinated structure. The estimates show that substantial size economies are possible. Tipo: Conference Paper or Presentation Palavras-chave: Research and Development/Tech Change/Emerging Technologies. Ano: 2003 URL: http://purl.umn.edu/35059 Policies to Facilitate Conversion of Millions of Acres to the Production of Biofuel Feedstock AgEcon Epplin, Francis M.; Haque, Mohua. First-generation grain ethanol biofuel has affected the historical excess capacity problem in U.S. agriculture. Second-generation cellulosic ethanol biofuel has had difficulty achieving cost-competitiveness. Third-generation drop-in biofuels are under development. If lignocellulosic biomass from perennial grasses becomes the feedstock of choice for second- and third-generation biorefineries, an integrated system could evolve in which a biorefinery directly manages feedstock production, harvest, storage, and delivery. Modeling was conducted to determine the potential economic benefits from an integrated system. Relatively low-cost public policies that could be implemented to facilitate economic efficiency are proposed. Tipo: Journal Article Palavras-chave: Biomass; Bio-oil; Cellulosic; Drop-in fuels; Ethanol; Land-lease contract; Lignocellulosic; Pyrolysis; Switchgrass; Resource /Energy Economics and Policy; Q16; Q18; Q15; Q42. Ano: 2011 URL: http://purl.umn.edu/113532 Economies of Size for Conventional Tillage and No-till Wheat Production AgEcon Epplin, Francis M.; Stock, Curtis J.; Kletke, Darrel D.; Peeper, Thomas F.. Production costs and economies of size for both conventional tillage and no-till wheat production were determined. The reduction in the price of glyphosate after the patent expired improved the relative economics of no-till for continuous monoculture winter wheat. Production costs differ across farm size and by production system. Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries. Ano: 2005 URL: http://purl.umn.edu/35615 Alternative Cropping Systems for Traditional Monoculture Wheat Acres in the Southern Plains for Two Farm Sizes AgEcon Decker, JonAnn E.; Epplin, Francis M.; Morley, Deena L.; Peeper, Thomas F.. The economics of five alternative crop production systems for the Southern Plains winter wheat production region, for both conventional tillage and no-till, for two farm sizes, was determined. Yield data were obtained from a three-year experiment conducted on three farm fields in the region. Tillage costs differ across farm size. Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries; Farm Management. Ano: 2008 URL: http://purl.umn.edu/6843 Level of Carbon Tax Required for Switchgrass and Miscanthus to Compete with Coal for Generating Electricity AgEcon Aravindhakshan, Sijesh C.; Epplin, Francis M.; Taliaferro, Charles M.. Tipo: Conference Paper or Presentation Palavras-chave: Carbon tax; Miscanthus; Switchgrass; Agricultural and Food Policy; Crop Production/Industries; Q10. Ano: 2010 URL: http://purl.umn.edu/61133 USE OF CONSERVATION RESERVE PROGRAM LAND FOR BIOREFINERY FEEDSTOCK PRODUCTION AgEcon Mapemba, Lawrence D.; Epplin, Francis M.. Legislation passed in 2002 enables managed harvesting and grazing of Conservation Reserve Program (CRP) land, including harvesting of biomass. The objective of the research is to determine the cost to acquire, harvest, store, and deliver a steady flow of biomass from CRP grasslands to a biorefinery. Tipo: Conference Paper or Presentation Palavras-chave: Resource /Energy Economics and Policy. Ano: 2004 URL: http://purl.umn.edu/20336 LINEAR RESPONSE STOCHASTIC PLATEAU FUNCTIONS AgEcon Tembo, Gelson; Brorsen, B. Wade; Epplin, Francis M.. A method of estimating a linear response stochastic plateau function is developed and used to determine optimal levels of nitrogen fertilization for wheat. Under the stochastic plateau model, optimizing behavior implies different nitrogen levels than the linear plateau model, depending on the output/input price ratio relative to a threshold level. Tipo: Conference Paper or Presentation Palavras-chave: Research Methods/ Statistical Methods. Ano: 2003 URL: http://purl.umn.edu/35217 Registros recuperados: 44 Primeira ... 1 2 3 ... Última

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