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Registros recuperados: 14
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A Preliminary Analysis of the Benefits of Introducing Apomixis into Rice AgEcon
Frisvold, George B.; Bicknell, Kathryn; Bicknell, Ross.
The objective of this research is to undertake an ex ante economic analysis of basic scientific research that aims to identify the gene(s) that control apomictic reproduction, with the ultimate aim of transferring the characteristic into commercially important crops. This paper reports very preliminary results, using the introduction of apomixis into rice as a case study. Apomixis is a natural, asexual method of plant reproduction resulting in offspring that are genetically identical to the mother plant. Apomixis promises to revolutionize plant breeding by providing a system for crop improvement that allows any desired variety, including hybrids, to breed true. This ability will make both breeding and seed production more efficient. It offers the...
Tipo: Conference Paper or Presentation Palavras-chave: Agribusiness; Agricultural and Food Policy; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Institutional and Behavioral Economics; Land Economics/Use; Production Economics; Research Methods/ Statistical Methods.
Ano: 2005 URL: http://purl.umn.edu/98515
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Adoption of Best Management Practices to Control Weed Resistance By Cotton, Corn, and Soybean Growers AgEcon
Frisvold, George B.; Hurley, Terrance M.; Mitchell, Paul D..
This study examined adoption of ten best management practices (BMPs) to control weed resistance to herbicides. Using data from a survey of 1,205 U.S. cotton, corn, and soybean growers, count data models were estimated to explain the total number of practices frequently adopted. Ordered probit regressions were used to explain the frequency of individual BMP adoption. Growers practicing a greater number of BMPs frequently (a) had more education, but less farming experience; (b) grew cotton, (c) expected higher yields relative to the county average; and (d) farmed in counties with a lower coefficient of variation (CV) for yield of their primary crop. Yield expectations and variability were significant predictors of the frequency of adoption of individual...
Tipo: Conference Paper or Presentation Palavras-chave: Weeds; Herbicide; Resistance management; Corn; Cotton; Soybeans; Adoption; Crop Production/Industries; Farm Management; Production Economics; Research and Development/Tech Change/Emerging Technologies; Q12; Q16.
Ano: 2009 URL: http://purl.umn.edu/49432
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AIR POLLUTION AND FARM-LEVEL CROP YIELDS: AN EMPIRICAL ANALYSIS OF CORN AND SOYBEANS AgEcon
Westenbarger, David A.; Frisvold, George B..
While many studies have estimated the impacts of air pollution on crop yields on experimental plots, few have estimated these impacts under actual farm production conditions. This study econometrically estimates the impact of air pollution on corn and soybean yields, controlling for weather, soil quality and management practices, using farm-level data for the eastern United States. Ozone pollution was found to reduce yields for both crops. The mean elasticity of yield with respect to ozone exposure was -0.19 for corn and -0.54 for soybeans. The benefits of ozone standards to protect crops, measured in terms of crop revenues, range from $17 to $82 million depending on the stringency of the standard. Over 85 percent of the revenue gains are captured by...
Tipo: Journal Article Palavras-chave: Crop Production/Industries; Environmental Economics and Policy.
Ano: 1995 URL: http://purl.umn.edu/31603
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BIORATIONAL INSECTICIDE ADOPTION AND CONVENTIONAL INSECTICIDE USE: A SIMULTANEOUS, LIMITED DEPENDENT VARIABLE MODEL AgEcon
Frisvold, George B.; Agnew, G. Ken; Baker, Paul.
Using data reporting section-level pesticide use for all of Arizona, this study estimates how early-season adoption of new biorational insecticides reduced subsequent broad-spectrum insecticide applications in cotton. The two-stage econometric model accounts for the endogeneity and censoring of the adoption intensity variable. One biorational application substituted for 3.66 broad-spectrum applications.
Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries.
Ano: 2002 URL: http://purl.umn.edu/19779
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COMPETITIVE GRANTS AND THE FUNDING OF AGRICULTURAL RESEARCH IN THE U.S. AgEcon
Day-Rubenstein, Kelly A.; Heisey, Paul W.; Klotz-Ingram, Cassandra; Frisvold, George B..
To increase the efficiency of the public agricultural R&D system, expanded use of competitive grants to fund state institutions has been advocated. This paper characterizes different funding instruments and empirically assesses the effects of changes in mechanism use. Factors associated with greater levels of competitive grants are modeled.
Tipo: Conference Paper or Presentation Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 2000 URL: http://purl.umn.edu/21863
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Crop Genetic Resources: An Economic Appraisal AgEcon
Day-Rubenstein, Kelly A.; Heisey, Paul W.; Shoemaker, Robbin A.; Sullivan, John; Frisvold, George B..
Crop genetic resources are the basis of agricultural production, and significant economic benefits have resulted from their conservation and use. However, crop genetic resources are largely public goods, so private incentives for genetic resource conservation may fall short of achieving public objectives. Within the U.S. germplasm system, certain crop collections lack sufficient diversity to reduce vulnerability to pests and diseases. Many such genetic resources lie outside the United States. This report examines the role of genetic resources, genetic diversity, and efforts to value genetic resources. The report also evaluates economic and institutional factors influencing the flow of genetic resources, including international agreements, and their...
Tipo: Report Palavras-chave: Genetic resources; Genetic diversity; Germplasm; R&D; International transfer of genetic resources; In situ conservation; Ex situ conservation; Gene banks; Intellectual property.; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2005 URL: http://purl.umn.edu/59388
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DIFFUSION OF BT COTTON AND INSECTICIDE USE AgEcon
Frisvold, George B..
This study estimated a dynamic logistic model to explain the diffusion Bt cotton in the United States. Regional differences in the speed and extent of Bt cotton adoption were explained by differences in availability of Bt seed adapted to local conditions, potential seed supplier profits, and economic variables affecting grower gains from adoption. The study also estimated the impact of Bt cotton on insecticide use, controlling for differences in pest infestations and prices and correcting for the endogeneity of the Bt adoption decision. Bt cotton significantly reduced insecticide applications to control target pests – cotton bollworm, tobacco budworm, and pink bollworm. Bt cotton has led to an overall reduction in these applications per total US cotton...
Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2004 URL: http://purl.umn.edu/36223
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Does Paying Referees Expedite Reviews? AgEcon
Thompson, Gary D.; Aradhyula, Satheesh V.; Frisvold, George B.; Tronstad, Russell.
Time series evidence from the Journal of Agricultural and Resource Economics suggests payments for on-time manuscript reviews can reduce review times. Some evidence suggests the effects of payments may attenuate over time.
Tipo: Conference Paper or Presentation Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 2004 URL: http://purl.umn.edu/19988
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Positive Analysis of Invasive Species Control as a Dynamic Spatial Process AgEcon
Buyuktahtakin, Esra; Feng, Zhuo; Olsson, Aaryn; Frisvold, George B.; Szidarovszky, Ferenc.
This paper models control of invasive buffelgrass (Pennisetum ciliare), a fire-prone African bunchgrass spreading rapidly across the southern Arizona desert as a spatial dynamic process. Buffelgrass spreads over a gridded landscape. Weed carrying capacity, treatment costs, and damages vary over grid cells. Damage from buffelgrass depends on its spatial distribution in relation to valued resources. We conduct positive analysis of recommended heuristic strategies for buffelgrass control, evaluating their ability to prevent weed establishment and to reduce damage indices over time. The high dimensionality of the problem makes full dynamic optimization intractable. However, two heuristic strategies – potential damage weighting and consecutive year treatment –...
Tipo: Conference Paper or Presentation Palavras-chave: Invasive species; Integer programming; Crop Production/Industries; Environmental Economics and Policy; Q57; Q58.
Ano: 2010 URL: http://purl.umn.edu/61753
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The effects of job site sanitation and living conditions on the health and welfare of agricultural workers AgEcon
Frisvold, George B.; Mines, Richard; Perloff, Jeffrey M..
The lack of field toilets on agricultural job sites increases the probability of gastrointestinal disorders by 60%. Adverse living conditions significantly increase the probability of gastrointestinal, respiratory, and muscular problems. These three health problems do not appear to increase the probability that a worker's family is on welfare or lower workers' earnings. Respiratory problems, however, substantially increase the probability that the worker receives unemployment compensation.
Tipo: Working or Discussion Paper Palavras-chave: Agricultural labor; Diseases; Health; Hygiene; Health Economics and Policy; Labor and Human Capital.
Ano: 1987 URL: http://purl.umn.edu/47039
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The Potential for Mobile Markets to Improve Food Access and Affordability: A Market Basket Analysis AgEcon
Frisvold, George B..
Tipo: Conference Paper or Presentation Palavras-chave: Food Consumption/Nutrition/Food Safety.
Ano: 2010 URL: http://purl.umn.edu/90633
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Transaction Costs and Institutional Innovations in Agricultural Labor Contracts AgEcon
Frisvold, George B..
This paper develops and econometrically tests a model of labor contractual choice in developing countries, focusing on the choice between directly hiring labor on a spot market versus reliance on labor contractors. The theoretical model examines the role of market prices and factor endowments on contract choice and the role of labor contracting as an institutional innovation to reduce transactions costs associated with the use of hired labor. Econometric results confirm hypotheses that contracting becomes more profitable as farm size and collateral ownership increase, as family size decreases, and with tightening of the casual labor market.
Tipo: Conference Paper or Presentation Palavras-chave: Labor and Human Capital.
Ano: 2005 URL: http://purl.umn.edu/19495
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Valuing the Roundup Ready® Soybean Weed Management Program AgEcon
Aultman, Stephen; Hurley, Terrance M.; Mitchell, Paul D.; Frisvold, George B..
This study examines soybean grower adoption of the Roundup Ready® (RR) weed management program with and without a residual herbicide application, and grower concerns regarding weed resistance to herbicides using telephone survey data from of 357 growers in 2007. It also estimates the pecuniary and non-pecuniary benefits enjoyed by growers from their RR program. The results indicate that soybean growers planned to treat 29 percent of their RR acres with a residual herbicide in 2008. More than half (53%) of the growers survey were concerned about weed resistance. The estimated expected benefit of the RR program in 2008 was $10.17 per acre, which translates into about $727 million with 75.7 million acres of soybean in the U.S. in 2008. The estimated...
Tipo: Conference Paper or Presentation Palavras-chave: Roundup Ready; Soybean; Glyphosate; Weed Resistance; Benefits; Crop Production/Industries; Demand and Price Analysis; Farm Management; Research and Development/Tech Change/Emerging Technologies.
Ano: 2009 URL: http://purl.umn.edu/49342
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Winners and Losers: Formula versus Competitive Funding of Agricultural Research AgEcon
Huffman, Wallace E.; Norton, George W.; Traxler, Greg; Frisvold, George B.; Foltz, Jeremy D..
Tipo: Journal Article Palavras-chave: Research and Development/Tech Change/Emerging Technologies; O3; O4; Q16.
Ano: 2006 URL: http://purl.umn.edu/94367
Registros recuperados: 14
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