Chemicals, humus and the soil; a simple presentation of contemporary knowledge and opinions about fertilizers, manures and soil fertility
Hopkins, Donald P.
Chemicals, humus and the soil; a simple presentation of contemporary knowledge and opinions about fertilizers, manures and soil fertility - London : Faber and Faber, 1957 - 288 p. : ilus.
16457
Fertilizantes y abonos.
Humus.
631.8 / H66 1957
Chemicals, humus and the soil; a simple presentation of contemporary knowledge and opinions about fertilizers, manures and soil fertility - London : Faber and Faber, 1957 - 288 p. : ilus.
16457
Fertilizantes y abonos.
Humus.
631.8 / H66 1957