Urbanization presents both opportunities and challenges to agriculture. This paper analyzes the effect of urbanization on the structure and profitability of agriculture at the rural-urban fringe. We develop a theoretical model accounting for changes in the amount of urban development, the level...

Compressed discs made from graphite and, its mechanical but not electrical isomorph, boron nitride, as well as graphite-boron nitride powders, undergoing compression, are nearly ideal continuum percolation systems; as the ratio of their conductivities is 10−18 and the scatter of the...

In the last 20 years, both public and private expenditures on resource conservation and environmental protection have increased dramatically. However, there are numerous technical and political barriers to the efficient use of conservation funds. This paper discusses some of these barriers and...

A dynamic model is developed to analyze farmers' irrigation investment and crop choice decisions under alternative water quality protection policies. The model is applied to an empirical example in the Oklahoma High Plains. The choices of crops and irrigation systems and the resulting levels of...

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This paper analyzes the costs and benefits of controlling groundwater pollution from agricultural use of nitrogen fertilizer in southwestern Ontario. The Village of Hensall, where nitrate concentrations have been observed above 10 mg/L in recent years, is selected as the study site.'The CREAMS...

Presents a study which looked at farmers' choice of conservation, tillage, rotation and soil testing practices in the Nebraska corn area. Estimation of various combinations of the practices impact on fertilizer use, corn yield, and soil erosion; Details on a polychotomous-choice selectivity...

A wide urban-rural disparity is observed in employment growth in the United States. For example, employment growth averaged 2.1 percent in urban counties during 1998-2007, compared with just 1 percent in rural counties. In this study, we examine the sources of U.S. employment growth using the...

There is broad concern that humans are transforming our environment. This transformation has potential to impact humanity as we depend on the environment ecosystem services. According to the Millennium Assessment (2005), degradation and unsustainable exploitation presently threaten over 60% of...

This paper presents an empirical analysis of major drivers of land use change in China from 1988 to 2005. We compile a geographic information system database and develop a new method to estimate an econometric land use model that explicitly takes into account the spatial interactions between...