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Regional estimates of the amount of U.S. agricultural land located in watersheds with poor water quality
[unknown]
1994
Antarctica A Keystone in a Changing World
unpublished
Preserved Fulltext
An estimated 71 percent of U.S. cropland (nearly 300 million acres) is located in watersheds where the concentration of at least one of four common surface water contaminants exceeded generally accepted criteria in 1989. This figure serves as an approximate measure of the efficiencies to be gained by restricting agricultural pollution controls to watersheds with poor water quality.
doi:10.3133/ofr94399
fatcat:m6p6yu7a6zbh5a3xrdygn6bfna