Essential elements and soil amendments for plants : sources and use for agriculture /
Severson, R. C.(Ronald Charles),1945-
Shacklette, Hansford T.
Washington : U.S. G.P.O.,
1988.
"Geologic and incidental sources of elements essential for plant growth, and amendments used to improve physical properties of soils."
Crops and soils.
Crops
Soil chemistry.
Geochemistry.
Fertilizers.
Soil amendments.