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
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