Chemicals, humus, and the soil ; a simple presentation of contemporary knowledge and opinions about fertilizers, manures, and soil fertility.

Bibliographic Details

Main Author:	Hopkins, Donald Percy, 1909-
Format:	Book
Language:	English
Published:	Brooklyn : Chemical Pub. Co., 1948.
Edition:	[American ed.].
Subjects:	Fertilizers. Humus. Soil fertility.