National Soil Tilth Laboratory.
Contributors: National Soil Tilth Laboratory (U.S.)
Publisher: Agricultural Research Service, U.S. Dept. of Agriculture
Published: 1992
Place of publication: Ames, Iowa
Language: eng
Subjects: National Soil Tilth Laboratory (U.S.); Soils -- Research -- United States.
Notes: Shipping list no.: 92-0320-P.