Ortho agronomy handbook
Ortho agronomy handbook a practical guide to soil fertility and fertilizer use prepared by the Fertilizer Division, Chevron Chemical Company ; compiled and edited by R.M. Thorup. - San Francisco Chevron Chemical Co. 1984 - 454 p. ill. 21 cm.
Includes index.
Soil fertility.
Fertilizers.
Soil management.
631.8(02) / O8