文章基本信息

标题：Impacts of Agricultural Practices and Policies on Potential Nitrate Water Pollution in the Midwest and Northern Plains of the United States
本地全文：下载
作者：Wu, JunJie ; Lakshminarayan, P.G. ; Babcock, Bruce A. 等
期刊名称：Journal of Food Distribution Research
印刷版ISSN：0047-245X
出版年度：1996
期号：SUPPL
出版社：Food Distribution Research Society
摘要：An empirical model is developed to estimate the effects of alternative farming practices on potential nitrogen runoff and leaching in 128,591 National Resources Inventory sites across the Midwest and the Northern Plains of the United States. This model integrates the effects of soils, climate, crops, and management practices on nitrogen loss. The model is applied to evaluation of two policy scenarios. The first scenario reduces N fertilizer application rates by 25 percent through the soil N test. The second replaces continuous cropping practices with crop rotations. The results show that policy effects vary widely across the study region. This analysis emphasizes the importance of conducting policy analysis on a disaggregated scale.
关键词：farming practices;nitrogen runoff and leaching;spatial heterogeneity;disaggregated policy analysis