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| Babcock, Bruce A.; Pautsch, Gregory R.. |
| This paper estimates the potential value of switching from applying nitrogen fertilizer according to SRT to applying it according to VRT in 12 Iowa counties. Change in yields, nitrogen use, and profits are estimated for individual fields and entire countries as farmers move from SRT to VRT. The county-level results indicate modest increases in returns over fertilizer costs, ranging form $7.43 per acre to $1.49 per acre. The county-level VRT production benefits are increases in yields ranging form 0.05 to 0.50 bushels per acre and reduction in production costs ranging from $1.19 to $6.83 per acre. The VRT environmental benefit for the entire study area is quite large, ranging from 77 to 172 tons of nitrogen. Increases in the price of corn and nitrogen... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Crop Production/Industries. |
| Ano: 1997 |
URL: http://purl.umn.edu/18486 |
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| Pautsch, Gregory R.; Babcock, Bruce A.; Breidt, F. Jay. |
| Studies examining the value of switching to a variable rate technology (VRT) fertilizer program assume producers possess perfect soil nitrate information. In reality, producers estimate soil nitrate levels with soil sampling. The value of switching to a VRT program depends on the quality of the estimates and on how the estimates are used. Larger samples sizes, increased spatial correlation, and decreased variability improve the estimates and increase returns. Fertilizing strictly to the estimated field map fails to account for estimation risk. Returns increase if the soil sample information is used in a Bayesian fashion to update the soil nitrate beliefs in nonsampled sites. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 1999 |
URL: http://purl.umn.edu/30797 |
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| Pautsch, Gregory R.; Kurkalova, Lyubov A.; Babcock, Bruce A.; Kling, Catherine L.. |
| Agricultural tillage practices are important human-induced activities that can alter carbon emissions from agricultural soils and have the potential to significantly contribute to reductions in greenhouse gas emission (Lal et al, 1998). This research investigates the expected costs of sequestering carbon in agricultural soils under different subsidy and market-based policies. Using the detailed National Resources Inventory data, we estimate the probability that farmers adopt conservation tillage practices based on a variety of exogenous characteristics and profit from conventional practices. These estimates are used with physical models of carbon sequestration to estimate the subsidy costs of achieving increased carbon sequestration with alternative... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Environmental Economics and Policy; Q38. |
| Ano: 2000 |
URL: http://purl.umn.edu/18391 |
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| Babcock, Bruce A.; Pautsch, Gregory R.. |
| This study develops a model based on the yield potential of various soil types in 12 Iowa counties to estimate the potential value of switching from uniform to variable fertilizer rates. Results indicate modest increases in the gross returns over fertilizer costs, ranging from $7.43 to $1.52 per acre. The net profitability of variable-rate technology (VRT) is sensitive to the per acre costs of moving to a VRT program. Under the assumptions of the model, applying variable rates would increase yield by 0.05 to 0.5 bushels per acre, and would reduce fertilizer costs by $1.19 to $6.83 per acre. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 1998 |
URL: http://purl.umn.edu/31195 |
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