Výsledky vyhledávání - "Jeffrey W. Hopkins"

Using historical biological data to evaluate status and trends in the Big Darby Creek watershed (Ohio, USA)

Autor: Mary K. Schubauer-Berigan, Jeffrey W. Hopkins, Marc Smith, Susan M. Cormier

Publikováno v: Environmental Toxicology and Chemistry. 19:1097-1105

Assessment of watershed ecological status and trends is challenging for managers who lack randomly or consistently sampled data, or monitoring programs developed from a watershed perspective. This study investigated analytical approaches for assessme

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::35acef22b69a1718e8674169791f0344
https://doi.org/10.1002/etc.5620190440

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Measures of Economic and Environmental Performance for Alternative Agricultural Production Systems

Autor: Jeffrey W. Hopkins, Kevin J. Bacon, Marvin T. Batte

Publikováno v: Journal of Production Agriculture. 11:428-438

The primary purpose of the reported research was to evaluate the economic and environmental performance of three production systems under study in the Ohio Buried Valley Aquifer Management Systems Evaluation Area (MSEA) project. The three systems stu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2986f744369bca55b7fa4347e3e706bf
https://doi.org/10.2134/jpa1998.0428

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Impacts of Nitrogen Control Policies on Crop and Livestock Farms at Two Ohio Farm Sites

Autor: Gary D. Schnitkey, Luther G. Tweeten, Jeffrey W. Hopkins

Publikováno v: Applied Economic Perspectives and Policy. 18:311-324

Empirical studies have noted that relatively small changes in farm management practices can significantly reduce emissions of agricultural effluents (Johnson, Adams, and Perry; Taylor, Adams, and Miller; Moxey and White). Farmers may voluntarily adop

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::213a49c352e4f4245dc39ebca391f603
https://doi.org/10.2307/1349618

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An Empirical Analysis of the Farm Problem: Comparability in Rates of Return

Autor: Mitchell J. Morehart, Jeffrey W. Hopkins

Publikováno v: Agricultural Policy for the 21st Century

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::414c60bee2ccc1c7c765877be2b05c6f
https://doi.org/10.1002/9780470390375.ch4

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Crop Genetic Diversity, Food Security and Farm Household Well-being During Shocks

Autor: Romina Cavatassi, Leslie Lipper, Jeffrey W. Hopkins

In this paper we use a unique dataset from eastern Ethiopia to explore the role of crop genetic resources in attaining household food security. The study area is a center of origin and domestication for sorghum, and about three quarters of the farms

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a50386620bca843a021fc2be00ee0ab
http://purl.umn.edu/19372

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