This publication provides details about the distribution of agricultural chemical active ingredients commonly applied to selected field and vegetable crops. It presents data on acreage treated with herbicides, insecticides, fungicides, and other pesticides. This report expands upon the information presented in the Agricultural Chemical Usage 2004 Field Crops Summary published in May 2005 and in the Agricultural Chemical Usage 2004 Vegetable Summary published in July 2005. Chemicals are listed by active ingredient, and distribution rates are described by Percent of Acres Treated, Number of Applications, Rate per Application, and Rate per Crop Year, and is organized by designated groups of crop-specific Program States.