Estimates of herbicide use for the sixty-first through the eightieth most-use herbicides in the conterminous United States

This coverage contains estimates of herbicide use for the sixty-first
through the eightieth most-used herbicides in the conterminous United
States as reported in Gianessi and Puffer (1991). Herbicide-use estimates
in this coverage are reported for each county polygon as acres treated,
pounds of active ingredient used, and pounds used per square mile.

The herbicide-use estimates provided by Gianessi and Puffer (1991) list
acres treated and pounds of active ingredient applied for a given crop
in each county for which use has been estimated. Cropping data are from the
1987 Census of Agriculture, and are subject to occasional suppressions of
acreage estimates at the county level due to problems of confidentiality
and census disclosure rules. The herbicide-use estimates included in
this coverage are totals of use on all crops treated in a given county.

The polygons representing county boundaries in the conterminous United
States, as well as lakes, estuaries, and other nonland-area features
were derived from the Digital Line Graph (DLG) files representing the
1:2,000,000-scale map in the National Atlas of the United States (1970).

Herbicides
Herbicide use
Counties
United States