A dynamic programming algorithm is proposed for a class of nonpoint source pollution control problems. The inherently combinatorial nature of these problems--stemming from the discrete nature of the decision variables, which are production and conservation practices--gives them a special...

This report summarizes the major findings of a study in which an integrated agro-ecological economic modeling system was constructed around Agriculture Canada's Canadian Regional Agriculture Model (CRAM) to analyze the economic and environmental impacts of proposed agricultural policies. The...

An environmental modeling system is being constructed around the EPIC model that will be interfaced with an economic component (RS-CRAM) within an integrated modeling system to analyze agricultural policies such as GRIP for western Canada. A description of the major EPIC subcomponents is...

The yield of products in the dry milling industry is largely determined by the physical properties of the corn kernel. The main objective of this paper is to investigate several statistical models of dry milling yield prediction based on physical characteristics of corn. Data consisting of one...

Atrazine is the most widely used herbicide for corn and sorghum and the most commonly encountered in surface water and groundwater. In addition to water quality problems, atrazine poses hazards through atmospheric transport, food residues, and exposure of applicators and wildlife. It atrazine...

Atrazine is the most widely used herbicide for corn and sorghum and the most commonly encountered in ground and surface water. In addition to water quality problems, atrazine poses hazards through atmospheric transport, food residues, and exposure of applications and wildlife. If atrazine use is...

This paper presents the results of a stochastic linear program for estimating the supply of corn residue for use as raw material in an ethanol plant. The model is based on the production capacity of an average Illinois farm, and considers the feasibility of three mutually exclusive residue...

This report describes the interface between RS-CRAM (resource sensitive Canadian Regional Agriculture Model) and the environmental components of the integrated modeling system for crops, crop sequences, and management systems representative of western Canadian agriculture. An experimentally...

Informed debate on agricultural nonpoint pollution requires evaluation of regional water quality in relation to management practices. It is prohibitive, in terms of cost and time, to run the site-specific process models for regional policy analysis. Therefore, a simplified and robust...

Production data on more than 11,000 state and collective farms in Ukraine were obtained through the VASKhNIL Research Agreement between the Center for Agricultural and Rural Development (CARD) at Iowa State University and the Ukrainian Institute of Agrarian Economics. Of particular interest to...