Chemicals, humus, and the soil; a simple presentation of contemporary knowledge and opinions about fertilizers, manures, and soil fertility.
Hopkins, Donald Percy, 1909-
Chemicals, humus, and the soil; a simple presentation of contemporary knowledge and opinions about fertilizers, manures, and soil fertility. - [American ed.] - Brooklyn, Chemical Pub. Co., 1948. - viii, 358 p. illus. 21 cm.
Bibliography: p. 347-349.
agr48000213
Fertilizers.
Manures.
Humus.
Soil fertility.
S633 / .H76 1948
Chemicals, humus, and the soil; a simple presentation of contemporary knowledge and opinions about fertilizers, manures, and soil fertility. - [American ed.] - Brooklyn, Chemical Pub. Co., 1948. - viii, 358 p. illus. 21 cm.
Bibliography: p. 347-349.
agr48000213
Fertilizers.
Manures.
Humus.
Soil fertility.
S633 / .H76 1948