In the 1970’s, agriculture in the United States seemed to be booming. With an extra demand for crops, extra acres were taken on to increase production which was predicted to increase further with an ever-growing population. However, concerns were beginning to be raised over the adequacy of land for crops as potential croplands began to be converted into urban areas as well as the effects of soil erosion decreasing the quality of these croplands. Originally published in 1983, this study investigates the threats to crop productivity in the U.S. with a focus on human-made problems. This title will be of interest to students of environmental studies.

The Universal Soil Loss Equation (USLE) enables planners to predict the average rate of soil erosion for each feasible alternative combination of crop system and management practices in association with a specified soil type, rainfall pattern, and topography. When these predicted losses are compared with given soil loss tolerances, they provide specific guidelines for effecting erosion control within specified limits. The equation groups the numerous interrelated physical and management parameters that influence erosion rate under six major factors whose site-specific values can be expressed numerically. A half century of erosion research in many States has supplied information from which at least approximate values of the USLE factors can be obtained for specified farm fields or other small erosion prone areas throughout the United States. Tables and charts presented in this handbook make this information readily available for field use. Significant limitations in the available data are identified.

By recording one country's experience with its vast natural resource base, America's Renewable Resources: Historical Trends and Current Challenges will help to inform the management of future demands on the resource base in the U.S. and throughout the world. The contributors focus specifically on renewable resources--water, forests, rangeland, cropland and soils, and wildlife--which possess the capacity to restore themselves after they have be consumed. Because this capacity can be destroyed and the time required for restoration can be very long, a balance in their use is necessary to sustain continued productivity. In arresting fashion, the authors trace the history of each resource's use from early colonial times through periods of dramatic, sometimes cataclysmic, changes in its utilization by an expanding, diversifying society. They show how unforeseen consequences have forced social institutions into existence and compelled policy makers, especially at the federal level, to deal with problems for which they were largely unprepared. America's Renewable Resources, by examining changes in demand, technologies, policies, and institutions, will assist both policy makers and the public at large to look past short-term events to the conditions fundamental to maintaining our future economic and environmental wellbeing. Originally published in 1991

The Geography of Rural Change provides a thorough examination of the processes and outcomes of rural change as a result of a period of major restructuring in developed market economies. After outlining the main dimensions of rural change, the book progresses from a discussion of theoretical insights into rural restructuring to a consideration of both the extensive use of rural land and the changing nature of rural economy and society. The text places an emphasis on relevant principles, concepts and theories of rural change, and these are supported by extensive case study evidence drawn from different parts of the developed world. The Geography of Rural Change is written for undergraduates taking courses in human geography, agricultural geography, rural geography, rural sociology, planning and agricultural economics.