The development of the field-scale Erosion Productivity Impact Calculator (EPIC) model was initiated in 1981 to support assessments of soil erosion impacts on soil productivity for soil, climate, and cropping conditions representative of a broad spectrum of U.S. agricultural production regions....

The Center for Agricultural and Rural Development (CARD) is developing a model to examine land use changes and their associated environmental and economic implications for the Southeast region of the United States. The model will be built as if there were two regions in the U.S. One region is...

Computer models are important tools for assessing regional carbon sequestration and other environmental impacts of agricultural management practices. The Environmental Policy Integrated Climate (EPIC) model is a very flexible model that has been used to make a wide range of field- and...

Concern about environmental impacts of nitrogen fertilizer use is increasing. Mainstream agriculture is dependent on nitrogen fertilizer and use patterns are polluting water resources. A five cent tax on nitrogen fertilizer is shown to have three benefits. National nitrogen fertilizer use is...

Soil erosion as an on-site problem received much attention in the 1985 Food Security Act (FSA), which established programs for the Conservation Reserve and conservation compliance. The 1985 FSA explicitly linked farmers' resource use and conservation activities to benefits received from...

The public and the agricultural community are concerned with the impact of agrichemical use on the environment. Of particular concern is the impact of pesticides and nitrogen on the quality of surface and ground waters (Nielson and Lee 1987). Although a national effort is under way to address...

This report summarizes the ARIMS analysis for the 1990 Farm Bill Conservation Initiatives Work Group. Three major tasks were completed. First, ARIMS was updated to reflect the short-run nature of possible 1990 farm bill policies. Specifically, ARIMS now incorporates a more differentiated set of...

Least cost production versus the environmental on- and off-site erosion damage of agriculture is evaluated in a policy context for a major Corn Belt watershed. Compromise programming, previously utilized in firm-level multi-criteria decision making problems is applied to a regional agricultural...