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	Provedor de dados AgEcon (14) Autor Carreira, Rita I. (14) Goodwin, Harold L., Jr. (6) Stoecker, Arthur L. (4) Wailes, Eric J. (4) Hattey, Jeffory A. (3) Kizer, Michael A. (3) Young, Kenneth B. (3) Danforth, Diana M. (2) Epplin, Francis M. (1) Hamm, Sandra J. (1) Mane, R. (1) McKenzie, Andrew M. (1) Metcalfe, Mark R. (1) Nemane, Vivek (1) Schroeter, Christiane (1) Williams, Joseph E. (1) Yoder, Jonathan K. (1) Mais... Palavra-chave Agribusiness (4) Crop Production/Industries (3) Livestock Production/Industries (3) Poultry litter (3) Agricultural and Food Policy (2) C61 (2) C65 (2) Demand and Price Analysis (2) Environmental Economics and Policy (2) Mathematical programming (2) Q12 (2) Q18 (2) Q30 (2) Q53 (2) A13 (1) A22 (1) Agricultural policy (1) Aquifer depletion (1) Baling poultry litter (1) Barge transportation (1) Mais... Tipo do documento Conference Paper or Presentation (11) Journal Article (3) Ano 2011 (1) 2009 (1) 2008 (1) 2007 (2) 2006 (3) 2005 (2) 2004 (2) 2001 (1) 2000 (1) Mais... País United States (14) Idioma Inglês (14)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 14 Primeira ... 1 ... Última Too Litter, Too Late: Economic Logistics of Transporting Nutrient-Rich Poultry Litter Out of Nutrient-Saturated Regions AgEcon Carreira, Rita I.; Young, Kenneth B.; Goodwin, Harold L., Jr.. Export of excess litter from concentrated animal production regions has become a pressing issue. A break even price for poultry litter in nutrient-deficient areas was identified through a math programming model using willingness to pay data from crop producers. Results indicate that a $16 subsidy is needed to sustain a long-term poultry litter market. Tipo: Conference Paper or Presentation Palavras-chave: Environmental Economics and Policy. Ano: 2005 URL: http://purl.umn.edu/19383 How Far Can Poultry Litter Go? A New Technology for Litter Transport AgEcon Carreira, Rita I.; Young, Kenneth B.; Goodwin, Harold L., Jr.; Wailes, Eric J.. Exporting northwest Arkansas excess turkey and broiler litter to partially fertilize nutrient-deficient cropland in eastern Arkansas can be more cost effective than to supply all crop nutrients with chemical fertilizer only, given current high fertilizer prices. Cost savings are greater if litter is baled in ultraviolet resistant plastic and transported via truck, since backhaul opportunities reduce truck rates, or alternatively, if raw litter is shipped via a truck-barge combination. Rice is the crop that allows for greater savings according to a mathematical programming model implemented in General Algebraic Modeling System (GAMS). Tipo: Journal Article Palavras-chave: Baling poultry litter; Barge transportation; Cost minimization; Manure management; Mathematical programming; Nutrient surplus; Poultry litter; Truck transportation; Agribusiness; Crop Production/Industries; C61; C65; Q12; Q30; Q53. Ano: 2007 URL: http://purl.umn.edu/37050 DYNAMIC SPREADSHEET PROGRAMMING TO SELECT THE MOST COST EFFICIENT MANURE HANDLING SYSTEM AgEcon Carreira, Rita I.; Stoecker, Arthur L.. Tipo: Conference Paper or Presentation Palavras-chave: Livestock Production/Industries. Ano: 2000 URL: http://purl.umn.edu/36430 Prepared for Bioterrorism Events? A Study of the Grain and Oilseed Sector AgEcon Wailes, Eric J.; Carreira, Rita I.; Danforth, Diana M.; Nemane, Vivek. One of the most crucial problems facing the U.S. economy is the possibility of a terrorist attack on its food sector. The implications can be profound for its stakeholders, who are highly dependent on this sector for their economic livelihood as well as their food supplies. The U.S. Bioterrorism Act of 2002 was enacted to improve the ability of the United States to prevent, prepare for and respond to bioterrorism and other public health emergencies. One of the important features of the U.S. Bioterrorism Act of 2002 is its emphasis on prevention, a change from prior legislation that focused on punishments after an incidence had occurred. The U.S. Bioterrorism Act does not address food safety issues in general; its focus is to prevent intentional... Tipo: Conference Paper or Presentation Palavras-chave: Bioterrorism; Grain and oilseed sector; Bioterrorism Act of 2002; NC-1016; Agribusiness; Agricultural and Food Policy; Marketing; Political Economy; I18; K23; Q13; Q18. Ano: 2011 URL: http://purl.umn.edu/103867 CHILDHOOD OBESITY IN THE U.S.: HOW EFFECTIVE ARE SCHOOL PREVENTION PROGRAMS? AgEcon Schroeter, Christiane; Carreira, Rita I.. This study uses a logistic regression to analyze the 2004-2005 Arkansas Center for Health Improvement body mass index data from four school districts in Arkansas. We conclude that the probability of elementary school children being overweight or at risk of being overweight depends on economic factors, demographics, and food availability. Tipo: Conference Paper or Presentation Palavras-chave: Health Economics and Policy. Ano: 2007 URL: http://purl.umn.edu/9933 Attitudes of College Students towards Agriculture, Food and the Role of Government AgEcon Carreira, Rita I.; Mane, R.; Danforth, Diana M.; Wailes, Eric J.. In 2002 and 2007 we surveyed Agribusiness students’ attitudes about agriculture, farming, food and agricultural policies. Responses were analyzed by year and student characteristics including farm background, citizenship and gender. Citizenship was a significant variable explaining differences in agreement with statements. Year and interactions with year were not significant. Tipo: Conference Paper or Presentation Palavras-chave: Agricultural policy; Farming; Logistic regression; Student attitudes; Agricultural and Food Policy; Teaching/Communication/Extension/Profession; A13; A22; C42; Q18. Ano: 2008 URL: http://purl.umn.edu/6806 How Much Is Poultry Litter Worth? AgEcon Carreira, Rita I.; Goodwin, Harold L., Jr.; Hamm, Sandra J.. Land-applying poultry litter to nutrient-deficient soils instead of commercial fertilizer could absorb nutrients from concentrated poultry production areas and help crop farmers. A survey of potential litter users showed that although farmers have used/are interested in using litter, there are still some problems that prevent the market from fully developing. Tipo: Conference Paper or Presentation Palavras-chave: Poultry litter; Survey; Nutrient excess; New markets; Agribusiness. Ano: 2006 URL: http://purl.umn.edu/35319 MANAGEMENT STRATEGIES TO MITIGATE ENVIRONMENTAL IMPACT OF WEATHER UNCERTAINTY IN EFFLUENT APPLICATION TO IRRIGATED CORN IN SEMIARID REGIONS AgEcon Kizer, Michael A.; Stoecker, Arthur L.; Carreira, Rita I.; Hattey, Jeffory A.. This study compares subsurface drip irrigation and sprinkler irrigation with respect to expected returns, aquifer life, nutrient utilization and accumulation in the production of irrigated corn using swine effluent and fresh groundwater from a depleting aquifer in the Oklahoma Panhandle. Most of the equations estimated econometrically had heteroskedasticity problems and MLE was used. The econometric estimation of a PDF of ammonia volatilization dependent on amount of nitrogen applied, for each irrigation system, was successful and is the basis for developing a stochastic chain for the soil nitrogen carryover equation. The results of the stochastic dynamic programming model are still being developed and will be presented at the conference. Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries; Environmental Economics and Policy. Ano: 2004 URL: http://purl.umn.edu/20110 Estimating a Demand Function for Poultry Litter AgEcon Carreira, Rita I.; Goodwin, Harold L., Jr.. Excess poultry litter could be a sustainable source of crop nutrients outside of nutrient-saturated regions if crop farmers are willing to utilize it. Using nearly 150 observations of actual poultry litter purchases in Oklahoma, Arkansas, and Missouri we estimate a demand function for poultry litter produced in northwest Arkansas. Tipo: Conference Paper or Presentation Palavras-chave: Poultry litter; Factor demand estimation; Econometrics; Northwest Arkansas; Demand and Price Analysis. Ano: 2006 URL: http://purl.umn.edu/21236 Alternative Model Selection Using Forecast Error Variance Decompositions in Wholesale Chicken Markets AgEcon McKenzie, Andrew M.; Goodwin, Harold L., Jr.; Carreira, Rita I.. Although Vector Autoregressive models are commonly used to forecast prices, specification of these models remains an issue. Questions that arise include choice of variables and lag length. This article examines the use of Forecast Error Variance Decompositions to guide the econometrician’s model specification. Forecasting performance of Variance Autoregressive models, generated from Forecast Error Variance Decompositions, is analyzed within wholesale chicken markets. Results show that the Forecast Error Variance Decomposition approach has the potential to provide superior model selections to traditional Granger Causality tests. Tipo: Journal Article Palavras-chave: Broiler markets; DAGs; Forecasting; Market structure; VAR; Agribusiness; Demand and Price Analysis; Livestock Production/Industries; Risk and Uncertainty; C53; D4; L1; Q00. Ano: 2009 URL: http://purl.umn.edu/48750 LAND APPLICATION OF SWINE WASTE: REGULATION AND PRODUCER PRACTICES IN OKLAHOMA AgEcon Metcalfe, Mark R.; Yoder, Jonathan K.; Williams, Joseph E.; Carreira, Rita I.. Tipo: Conference Paper or Presentation Palavras-chave: Livestock Production/Industries. Ano: 2001 URL: http://purl.umn.edu/36070 DYNAMIC COMPARISON OF SYSTEMS FOR IRRIGATION AND EFFLUENT APPLICATION AgEcon Carreira, Rita I.; Stoecker, Arthur L.; Hattey, Jeffory A.; Kizer, Michael A.. This study compares subsurface drip irrigation and sprinkler irrigation with respect to expected returns, aquifer life, nutrient utilization and accumulation in the production of irrigated corn using swine effluent and fresh groundwater from a depleting aquifer in the Oklahoma Panhandle. The results of the Dynamic Programming model indicate that SDI outperforms center pivot sprinkler irrigation in terms of NPV of net returns and reduced phosphorus accumulation in soil. Soil nitrogen accumulation in soil is greater with SDI. Groundwater depletion is projected to occur at the end of 36th year with center pivot irrigation. Tipo: Conference Paper or Presentation Palavras-chave: Resource /Energy Economics and Policy. Ano: 2004 URL: http://purl.umn.edu/34794 Subsurface Drip Irrigation Versus Center-Pivot Sprinkler for Applying Swine Effluent to Corn AgEcon Carreira, Rita I.; Stoecker, Arthur L.; Epplin, Francis M.; Hattey, Jeffory A.; Kizer, Michael A.. A risk-averse irrigated corn producer would be better off choosing the more expensive subsurface drip irrigation (SDI) over center-pivot sprinkler (CPS), given limited aquifer life and swine effluent and urea fertilization. A stochastic optimization using EPIC data maximized expected utility of 100 years' worth of net revenues for a quarter section. Phosphorus accumulation was more likely with the CPS than with the SDI but soil nitrogen was constant under both systems. SDI conserves more water than CPS per acre but depletes the aquifer faster because a greater area is irrigated. These results were invariant in the sensitivity analysis. Tipo: Journal Article Palavras-chave: Aquifer depletion; Center-pivot sprinkler irrigation; Certainty equivalent; Corn irrigation; Mathematical programming; Risk; Stochastic optimization; Subsurface drip irrigation; Crop Production/Industries; C61; C65; Q12; Q30; Q53. Ano: 2006 URL: http://purl.umn.edu/43783 Economics of Transporting Poultry Litter from Northwest Arkansas to Eastern Arkansas Croplands AgEcon Young, Kenneth B.; Carreira, Rita I.; Wailes, Eric J.; Goodwin, Harold L., Jr.. Applying baled litter from northwest Arkansas shipped by truck with backhauls, supplemented with chemical fertilizers provided the most cost-efficient method to supply nutrients to crops in eastern Arkansas, according to a GAMS optimization. Shipping raw litter by truck and barge is the optimal choice when backhauls or baling is unavailable. Tipo: Conference Paper or Presentation Palavras-chave: Public Economics. Ano: 2005 URL: http://purl.umn.edu/35635 Registros recuperados: 14 Primeira ... 1 ... Última

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