1992 County Pesticide Use Estimates for 200 Compounds

This dataset includes information for 200 pesticides on the average amount
(pounds) applied to 87 agricultural crops and the acres of crops treated for
counties within the conterminous United States. These data were derived by
combining published state pesticide use coefficients published by the
National Center for Food and Agricultural Policy (NCFAP) and county
harvested crop acres available from the 1992 Census of Agriculture.
A description of the methods used to develop the county database
is published in USGS OFR 00-250, "Method for Estimating Pesticide Use"
and is available online from: http://pubs.er.usgs.gov/pubs/ofr/ofr00250.
Maps showing the geographic distribution of use patterns for 199
compounds (BT was not mapped) area available from http://ca.water.usgs.gov/pnsp/.
The pesticide use estimates contained in this file represent average
usage patterns for the years 1990-1993 and do not represent a specific
year. The key limitations of the data include the following:
(1) state use coefficients represent an average for the entire
state and consequently do not reflect the local variability of
pesticide management practices found within states and counties,
(2) pesticide use estimates are not for a specific year, but
represent typical use patterns for a four year period, (3) state
pesticide use coefficients many not have been available for all states
where a pesticide may have been applied to agricultural land,
and therefore, are not included, and (4) the county crop acreage
use to estimate county pesticide use is from the 1992 Census of
Agriculture and may not represent all crop acreage because of
Census nondisclosure rules.