Choropleth Map

This map uses interval quantities and color shading to accurately define the regions (both county and subsequent state) that use farmland to grow certain crops. The crops are defined at the top, and intervals regarding acreage are labeled at the right using color-coding.

http://www.nass.usda.gov/research/atlas02/Crops/
Hay%20and%20Forage%20Crops%20Harvested/Hay%20-%20
All%20Hay%20Including%20Alfalfa,%20Other%20Tame,%20Small%20Grain,
%20and%20Wild,%20Harvested%20Acres-choropleth%20map.gif