Commercial fertilizers and soil fertility in California
By: P.L. Hibbard
Series: California Agricultural Extension Service. Circular -- 57, October, 1931; Circular (University of California Agricultural Extension Service) -- 57.
Publisher: College of Agriculture, University of California
Published: 1931
Place of publication: Berkeley, Calif
Language: eng
Number of pages: 37
Subjects: Soils; Fertilizers; Manures