TY  - BOOK
AU  - Hopkins,Donald Percy
TI  - Chemicals, humus, and the soil: a simple presentation of contemporary knowledge and opinions about fertilizers, manures, and soil fertility
AV  - S633 .H76 1948
PY  - 1948///
CY  - Brooklyn
PB  - Chemical Pub. Co.
KW  - Fertilizers
KW  - Manures
KW  - Humus
KW  - Soil fertility
N1  - Bibliography: p. 347-349
ER  -