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

Hopkins, D.P.

Chemicals, humus and the soil a simple presentation of contemporary knowledge and opinions about fertilizers, manures and soil fertility by D.P. Hopkins - London 1946 - 278 p. & 3 pls.


Agricultural Chemicals
Humus
Soil

631.81+631.417.2 / H 793 C
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