Tillage practices in the conterminous United States, 1989-2004--datasets aggregated by watershed
By: by Nancy T. Baker ; prepared in cooperation with the Conservation Technology Information Center
Contributors: National Water-Quality Assessment Program (U.S.); Conservation Technology Information Center; Geological Survey (U.S.)
Series: Data series -- 573; Data series (Geological Survey (U.S.)) -- 573.
Publisher: U.S. Dept. of the Interior, U.S. Geological Survey
Published: 2011
Place of publication: Reston, VA
Language: eng
Format: [electronic resource] /
Number of pages: 22
Subjects: Tillage
Notes: Title from title screen (viewed Apr. 7, 2011).

"National Water-Quality Assessment Program."

Includes bibliographical references (p. 12).