Characteristics for separating the four biotypes (A, B, C, and D) of the greenbug, Schizaphis graminum (Rondani), are discussed, including morphological differences and response to resistant varieties and insecticides. Techniques for culturing greenbugs on caged plant:; in the greenhouse are...

The response of export demand to price changes for selected agricultural products did not become elastic over the 1969-77 period. This report is the first to test empirically the hypothesis that, during the 1970's, competition increased and the United States became a marginal exporter of farm...

The method often proposed to meet environmental goals such as water quality improvement is input restriction, such as reduced fertilizer or pesticide use. Computable general equilibrium (CGE) models are potentially valuable tools to analyze the economic impact of such programs. However, to be...

The level of residentiary employment in areas such as counties is an important component of rural development, environmental, and energy impact analysis. Volatile employment changes lead to migration, population, and wage changes. This study demonstrates a procedure for estimating disaggregated...

Presents information forest geneticists need about applied mathematics, statistics, population biology, and genetics in order to design breeding programs. College-level training in mathematics, statistics, and genetics is required to understand most of the book.