U.S. Geological Survey

507 National Center

Reston, Virginia 22042

(703) 860-6045

U.S. Geological Survey

507 National Center

Reston, Virginia 22042

(703) 860-6045

National Resources Inventory Database

Resource Inventory and GIS Division

U.S. Department of Agriculture, Soil Conservation Service

P.O. Box 2890

Washington, D.C. 20013

(202) 720-5420

Agricultural Irrigation and Water Use Publication

U.S. Department of Agriculture, Economic Research Service

P.O. Box 1608

Rockville, Maryland 20849

National Herbicide Use Database

Resources for the Future

1616 P Street, NW

Washington, D.C. 20036

(202) 328-5000

Pesticide Properties Database

U.S. Department of Agriculture, Soil Conservation Service

Ecological Sciences Division

P.O. Box 2890

Washington, D.C. 20013

(202) 720-2587

Agricultural Chemical Usage Database

U.S. Department of Agriculture,

National Agricultural Statistics Service

P.O. Box 1608

Rockville, Maryland 20849

(800) 999-6779

1987 Census of Agriculture

Data User Services Division

Customer Service

U.S. Bureau of the Census

Washington, D.C. 20233

(301) 763-1113