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Registros recuperados: 44
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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
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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
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AN ALTERNATIVE METHOD FOR ANALYZING FORAGE/LIVESTOCK SYSTEMS AgEcon
Doye, Damona G.; Smith, Karen; Epplin, Francis M.; Kletke, Darrel D.; Lalman, David L..
A mixed integer program solves for profit-maximizing forage and beef enterprises. Dry matter, total digestible nutrients, and crude protein characterize livestock nutritional needs and production of warm and cool season forages.
Tipo: Conference Paper or Presentation Palavras-chave: Livestock Production/Industries.
Ano: 2000 URL: http://purl.umn.edu/36520
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Biomass Yield to Nitrogen Response Functions for Four Candidate Biorefinery Feedstock Perennial Grass Species AgEcon
Aravindhakshan, Sijesh C.; Epplin, Francis M.; Taliaferro, Charles M..
Biomass yield to nitrogen response functions were determined for four perennial grass species. The species, nitrogen level, and harvest frequency that maximize expected net returns given the climate and soils of the U.S. Southern Plains were determined. For most combinations of biomass and nitrogen price, switchgrass is the optimal species.
Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries; Resource /Energy Economics and Policy.
Ano: 2008 URL: http://purl.umn.edu/6081
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Canola-Wheat Rotation versus Continuous Wheat for the Southern Plains AgEcon
Duke, Jason C.; Epplin, Francis M.; Vitale, Jeffrey D.; Peeper, Thomas F..
Crop rotations are not common in the wheat belt of the Southern Plains. After years of continuous wheat, weeds have become increasingly difficult and expensive to manage. Yield data were elicited from farmers and used to determine if canola-wheat-wheat rotations are economically competitive with continuous wheat in the region.
Tipo: Conference Paper or Presentation Palavras-chave: Crop rotation; Wheat; Canola; Elicited yield distributions; Crop Production/Industries; Farm Management; Q10; Q12.
Ano: 2009 URL: http://purl.umn.edu/46620
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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
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Conventional Tillage versus No-till: Characteristics of Producers and Farms AgEcon
Djido, Abdoulaye Ibrahim; Vitale, Jeffrey D.; Epplin, Francis M..
A survey of Oklahoma farmers was conducted to determine characteristics of farms across three tillage categories: conventional tillage exclusively; no-till exclusively; other (combination of systems). The seven percent that use no-till exclusively crop more acres, rent more acres, and use more crop rotations than farms that use conventional tillage exclusively.
Tipo: Conference Paper or Presentation Palavras-chave: No-till; Conventional tillage; Survey; Farm machinery; Farm size; Wheat; Perceptions; Crop Production/Industries; Farm Management; Q10; Q12.
Ano: 2009 URL: http://purl.umn.edu/46717
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Cost to Produce Cellulosic Biomass Feedstock: Four Perennial Grass Species Compared AgEcon
Haque, Mohua; Epplin, Francis M.; Aravindhakshan, Sijesh C.; Taliaferro, Charles M..
Switchgrass has been proposed as a dedicated energy crop to fulfill long-term policy goals. Production costs were determined for switchgrass and three alternative perennial grass species for four levels of nitrogen fertilizer and two harvest systems. For the alternatives evaluated, biomass production cost per ton was lowest for switchgrass.
Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries.
Ano: 2008 URL: http://purl.umn.edu/6817
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Days Available for Harvesting Lignocellulosic Biomass AgEcon
Hwang, Seonghuyk; Epplin, Francis M..
A reasonably precise estimate of the number of harvest days is necessary to determine the investment in harvest machines required to support a lignocellulosic biorefinery. This study was undertaken to determine probability distributions for the number of suitable field work days per month for harvesting perennial grasses such as switchgrass.
Tipo: Conference Paper or Presentation Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2007 URL: http://purl.umn.edu/34991
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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
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Economically Feasible Crop Production Alternatives to Peanuts in Southwestern Oklahoma AgEcon
Devkota, Shankar; Holcomb, Rodney B.; Taylor, Merritt J.; Epplin, Francis M..
Changes in the U.S. peanut program have resulted in drastically decreased planted acres and forced many peanut producers in the Southwest to consider alternative crops. This study examined the economic risk associated with producing peanuts and common alternatives to peanuts. Seedless watermelon is an alternative for risk preferring farmers whereas, irrigated peanut is the best choice for risk averse farmers.
Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries.
Ano: 2006 URL: http://purl.umn.edu/35377
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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
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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
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Environmental Consequences of Ethanol from Corn Grain, Ethanol from Lignocellulosic Biomass, and Conventional Gasoline AgEcon
Mapemba, Lawrence D.; Epplin, Francis M.; Huhnke, Raymond L..
The Energy Policy Act of 2005 includes a provision designed to double the production and use of ethanol in fuels by 2012, and that beginning in 2013, a minimum of 250 million gallons per year of ethanol be produced from lignocellulosic sources such as corn stover, wheat straw, and switchgrass. This study was conducted to determine the environmental and health consequences of using ethanol as an additive to gasoline. Comparisons are made among conventional gasoline (CG), a blend of 10 percent corn-ethanol and 90 percent CG (E10-corn), and a blend of 10 percent ethanol produced from lignocellulosic biomass (LCB) and 90 CG (E10-LCB).
Tipo: Conference Paper or Presentation Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2006 URL: http://purl.umn.edu/21034
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FAIR, POSTFAIR, AND NOFAIR: A COMPARISON OF CROPPING ALTERNATIVES FOR THE SOUTHERN GREAT PLAINS AgEcon
Biermacher, Jon T.; Epplin, Francis M.; Keim, Kent R..
The Federal Agriculture Improvement and Reform Act of 1996 was promoted as legislation that would enable and encourage farmers to base planting decisions on market incentives rather than commodity programs. Data from a designed experiment are used to compare the economics of three cropping systems for alternative commodity programs.
Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries.
Ano: 2003 URL: http://purl.umn.edu/35211
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Forage plus Grain Wheat versus Grain-Only Wheat AgEcon
Duke, Jason C.; Epplin, Francis M.; Vitale, Jeffrey D.; Peel, Derrell S..
Winter wheat may be grown in the Southern Plains either to produce grain only, or as a dual-purpose crop to produce both fall-winter forage and grain. The objective of the research is to determine expected net returns for both production systems. The estimated expected net value of the dualpurpose system stocked with steers with an initial weight of 450 pounds is from $38 to $92 per acre greater than that of the grain-only system. The economic success of dual-purpose wheat depends on a number of management factors including stocking density.
Tipo: Article Palavras-chave: Crop Production/Industries.
Ano: 2011 URL: http://purl.umn.edu/118948
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INTEGRATED CROP AND LIVESTOCK RISK MODELING AgEcon
Tembo, Gelson; Kaitibie, Simeon; Epplin, Francis M..
This study was conducted to determine risk efficient production strategies for crop and livestock producers who have the opportunity to produce wheat as a dual-purpose forage and grain crop. Empirical data obtained from field trials were incorporated into an integrated crop and livestock production and marketing risk programming model.
Tipo: Conference Paper or Presentation Palavras-chave: Production Economics; Risk and Uncertainty.
Ano: 1999 URL: http://purl.umn.edu/21505
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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
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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
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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
Registros recuperados: 44
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