Soil degradation
Subtitle: effects on agricultural productivity
By: prepared by National Association of Conservation Districts.
Contributors: National Agricultural Lands Study (U.S.); Council on Environmental Quality (U.S.)
Series: Interim report -- no. 4; Interim report (National Agricultural Lands Study (U.S.)) -- no. 4.
Publisher: National Agricultural Lands Study
Published: 1980
Place of publication: Washington, D.C. (722 Jackson Place, N.W., Washington, D.C. 20006)
Language: eng
Number of pages: 56
Subjects: Soil productivity -- United States.; Soil erosion -- United States.; Soil conservation -- United States.
Notes: "Participating agencies: Council on Environmental Quality ..."--P. [4] of cover.

Bibliography: p. 55.