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Registros recuperados: 7
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Climate Variability and Agricultural Productivity: Evidence from Southeastern US AgEcon
Solis, Daniel; Letson, David.
The goal of this study is to empirically evaluate the extent to which agricultural productivity estimates are affected by variation on climate. To do so, we explore the case of the agricultural sector in the Southeast US. This geographical region is influenced seasonally by the El Niño Southern Oscillation (ENSO) phenomena making it ideal for studying the interaction of climate variability and agricultural productivity. Although, different methodologies have been developed to study TE the stochastic production frontier (SPF) approach offers several advantages over other available alternatives (Kumbhakar and Lovell 2003). Thus, to assess the impact of climatic on TE we estimate alternative SPF models with and without climatic variables. We also test...
Tipo: Conference Paper or Presentation Palavras-chave: Climate Variability; Productivity; US; Production Economics.
Ano: 2011 URL: http://purl.umn.edu/98894
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CONFINED ANIMAL PRODUCTION AND MANURE NUTRIENTS AgEcon
Gollehon, Noel R.; Caswell, Margriet; Ribaudo, Marc; Kellogg, Robert L.; Lander, Charles; Letson, David.
Census of agriculture data were used to estimate manure nutrient production and the capacity of cropland and pastureland to assimilate nutrients. Most farms (78 percent for nitrogen and 69 percent for phosphorus) have adequate land on which it is physically feasible to apply the manure produced onfarm at agronomic rates. (The costs of applying manure at these rates have not been assessed). Even so, manure that is produced on operations that cannot fully apply it to their own land at agronomic rates accounts for 60 percent of the Nation's manure nitrogen and 70 percent of the manure phosphorus. In these cases, most counties with farms that produce "excess" nutrients have adequate crop acres not associated with animal operations, but within the county, on...
Tipo: Report Palavras-chave: Manure; Nutrients; Manure nutrients; Animal waste; Confined livestock; Confined animal feeding operation; CAFO; Feedlot beef; Dairy cows; Swine; Poultry; Animal unit; Manure nitrogen; Manure phosphorus; Water quality; Livestock Production/Industries.
Ano: 2001 URL: http://purl.umn.edu/33763
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CONFINED ANIMAL PRODUCTION AND MANURE NUTRIENTS AgEcon
Gollehon, Noel R.; Caswell, Margriet; Ribaudo, Marc; Kellogg, Robert L.; Lander, Charles; Letson, David.
Using data from the Census of Agriculture on animal inventory and sales, we estimate manure nutrient production on farms with confined livestock. Using reported on-farm production of crops on these same farms, we estimate the nutrient uptake for major field crops and pastureland. This enables us to examine the balance between manure nutrient production and nutrient need measured by crop uptake at a farm level. Examination at alternative spatial scales, shows that 75 percent of counties in the U.S. have farms that produce more manure nutrients than can be assimilated on the farm of production (excess nitrogen).The vast majority of the counties that produce excess nitrogen have adequate land in the county to spread the manure at agronomic rates. Thus,...
Tipo: Conference Paper or Presentation Palavras-chave: Livestock Production/Industries.
Ano: 2000 URL: http://purl.umn.edu/36382
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DETERMINANTS OF HOUSEHOLD HURRICANE EVACUATION CHOICE IN FLORDIA AgEcon
Solis, Daniel; Thomas, Michael H.; Letson, David.
In this study we implement a set of econometric models to analyze the determinants of household hurricane evacuation choice for a sample of 1,355 households in Florida. This article contributes to the literature by accounting for two issues normally neglected in previous studies; namely, time and space. The empirical results suggest that households living in risky environments (mobile home and flooding areas) are more likely to evacuate. In addition, households with kids and those who have experience the treat of a hurricane also display higher probabilities to evacuate. Conversely, homeowners and households with pets are less likely to evacuate than their counterparts. Regional differences in propensity to evacuate are also clearly demonstrated, with...
Tipo: Conference Paper or Presentation Palavras-chave: Hurricane; Evacuation choice; Probit; Environmental Economics and Policy; Risk and Uncertainty.
Ano: 2008 URL: http://purl.umn.edu/45338
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ENSO AND SOYBEAN PRICES: CORRELATION WITHOUT CAUSALITY AgEcon
Letson, David; McCullough, B.D..
In this paper we seek to characterize the robustness of the ENSO/soybean price relationship and to determine whether it has practical economic content. If such a meaningful relationship exists, the implications could be profound for commodity traders and for public sector investments in climate forecasting capabilities. Also, the validity of economic evaluations of climate impacts and climate forecasts based on ENSO-price independence would come into question. Our findings suggest a relationship between interannual climate and soybean prices, although we are not able to attribute the relationship to ENSO or to say the ENSO is economically important.
Tipo: Journal Article Palavras-chave: Climate forecasting; Granger causality; Spectral analysis; SOI; SST; Resource /Energy Economics and Policy; C22; Q11.
Ano: 2001 URL: http://purl.umn.edu/15443
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ENSO Forecast Value, Variable Climate and Stochastic Prices AgEcon
Letson, David; Podesta, Guillermo; Messina, Carlos; Ferreyra, Andres.
We evaluate ENSO forecasts when prices are variable and ENSO is a portion of overall climatic variability. Forecast responses include crop mix, cultivar,fertilization, and planting date. Price changes reduce forecast value by excluding responses. Predictable income variability (ENSO-related), as a share of the total, evaluates forecast skill.
Tipo: Conference Paper or Presentation Palavras-chave: Environmental Economics and Policy.
Ano: 2001 URL: http://purl.umn.edu/20562
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Optimal Crop-Insurance Strategies under Climate Variability: Contrasting Insurer and Farmer Interests AgEcon
Cabrera, Victor E.; Solis, Daniel; Letson, David.
This study analyzes the potential synergies and conflicts of interest between farmers and insurers in the selection of an optimal crop insurance contract. Special attention is given to how climate information influences this decision-making process. To do so, we consider a representative 40 hectares, rainfed, cotton-peanut farm located in Jackson County in Florida. Our results show that year-to-year ENSO-based climate variability affects farmers’ income and insurers’ gains according to crop insurance contracts. Additionally, introduction of ENSO-based climate forecasts presents a significant impact on the selection of a particular contract. We conclude that insurers and farmers can bridge their divergent interests by improving their understanding of the...
Tipo: Conference Paper or Presentation Palavras-chave: Environmental Economics and Policy; Risk and Uncertainty.
Ano: 2007 URL: http://purl.umn.edu/9708
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