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| Registros recuperados: 20 | |
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| Westra, John V.; Zimmerman, Julie K.H.; Vondracek, Bruce. |
| Farmers produce many things in abundance for which they receive income, including food, feed, fiber and fuel. Similarly, farmers generate environmental benefits such as improved water quality by reducing soil and nutrient loss and improved wildlife habitat by managing their operation in certain ways. Unfortunately, most farmers receive limited or no compensation for these positive externalities they produce. If we wish to encourage more of these positive externalities, policies need to be established and implemented that compensate producers for the benefits society receives from specific farming practices. This research examined how production practices that provide environmental benefits would affect water quality (nutrient and sediment loss),... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Environmental Economics and Policy; Farm Management. |
| Ano: 2002 |
URL: http://purl.umn.edu/19785 |
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| Westra, John V.; Olson, Kent D.. |
| The state of Minnesota seeks to reduce phosphorus loading to the Minnesota River by 40% from current levels. The state agency charged with achieving this reduction has indicated each watershed should reduce its current phosphorus loading by 40%. We hypothesized that policies targeting specific practices or regions would have a smaller negative impact on farm income than policies requiring every nonpoint polluter to reduce its contribution by 40%. Using a stylized version of one major watershed in the river basin as an example, we analyzed the cost-effectiveness of various nonpoint pollution reduction policies. We simulated current and alternative farming systems (designed to reduce phosphorus loading by changing tillage or fertilizer practices) in... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Environmental Economics and Policy. |
| Ano: 2001 |
URL: http://purl.umn.edu/20653 |
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| Kim, Seon-Ae; Westra, John V.; Gillespie, Jeffrey M.. |
| Factors influencing the adoption of Russian Varroa-Resistant honey bees were assessed using a double hurdle model. Results indicate factors associated with the adoption include sales over $1,000 of bee related products, residence in the delta states, internet use, and membership in the AHPA. Negatively associated factors are high percentage of income coming from beekeeping, and membership in the ABF. Intensity of adoption increased with frequent contact with the USDA, and decreased with greater colony size, sales and membership in the ABF. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Farm Management. |
| Ano: 2006 |
URL: http://purl.umn.edu/21054 |
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| Westra, John V.. |
| To evaluate potential effects on net farm income and water quality from specific agricultural Best Management Practices (BMPs), estimates of phosphorus loading for current and alternative farming methods were combined with cost and return estimates to create a positive mathematical programming model of a major watershed. Targeting specific BMPs to susceptible regions was the most effective policy for improving water quality. This had smaller negative impacts on farm income than not targeting BMPs to reduce phosphorus effluent from agriculture. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Environmental Economics and Policy. |
| Ano: 2003 |
URL: http://purl.umn.edu/35191 |
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| Westra, John V.; Olson, Kent D.. |
| In a transect survey of crop residue levels in 1995 and 1996, two Minnesota counties had very different percentages of cropland with desired residue cover even though the soil types were similar. To gain a better understanding of the reasons behind this difference, the farmers in these two counties were surveyed about their use or lack of use of conservation tillage practices. A statistical logit analysis of survey responses showed farmers are more apt to adopt conservation tillage if they are larger; are more concerned about erosion on their land; have made a recent major investment in the farm; use other producers for tillage information; have the management skill for conservation tillage; and believe conservation tillage will fit with their production... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Crop Production/Industries. |
| Ano: 1997 |
URL: http://purl.umn.edu/13380 |
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| Vondracek, Bruce; Zimmerman, Julie K.H.; Westra, John V.. |
| Many conservation programs under the 2002 Farm Act address resource concerns such as water quality and aquatic communities in streams. Analyzing two such programs, simulated changes in agricultural practices decreased field-edge sediment losses by 25S31% in two geophysically distinct Minnesota watersheds. However, while in-stream sediment concentrations and lethal fisheries events decreased significantly in one watershed, there was no discernable improvement for the fisheries in the other, despite potentially spending over $100,000 annually in conservation payments. These results highlight the importance of performance-based conservation payments targeted to genuine resource concerns in watersheds and the value of integrated bioeconomic modeling of... |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2004 |
URL: http://purl.umn.edu/31370 |
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| Chintawar, Sachin; Gabrielyan, Gnel; Westra, John V.. |
| Multiple studies have estimated factors influencing cover crop adoption which include control weed population (Ngouajio et al. 2002), increased soil health (Santhi Wicks and Richard Howitt, 2005), and increased productivity (Johannes M. S. Scholberg, Santiago Dogliotti, Lincoln Zotarelli, Corey M. Cherr, Carolina Leoni and Walter A. H. Rossing, 2010, Jason Bergtold, Jason Fewella, and Patricia Duffy, 2010). An externality of adoption of cover crops that has not been explored is its potential impact on the amount of nitrogen use by farmers. Using a 2009 survey of conventional and organic corn farmers in 7 states of the US, we estimate the factors affecting adoption of cover crops and its impact on nitrogen use. While nitrogen used by farmers is considered... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Cover Crop Adoption; Nitrogen Management; Limited Dependent Endogenous Variable Model; Agricultural and Food Policy; Crop Production/Industries; Farm Management; Land Economics/Use; Production Economics; Resource /Energy Economics and Policy. |
| Ano: 2011 |
URL: http://purl.umn.edu/98825 |
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| Registros recuperados: 20 | |
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