Soil studies
Jordan, W.H.
Soil studies I. influence of fertilizers upon the productiveness of several types of soil, II. influence of fertilizers and plant growth upon soil solubles - Geneva 1920 - 1-27 p. - Soil, Fertilizers, Plant, Growth New York Agricultural Experiment Station. Bulletin No. 473 .
Soil studies I. influence of fertilizers upon the productiveness of several types of soil, II. influence of fertilizers and plant growth upon soil solubles - Geneva 1920 - 1-27 p. - Soil, Fertilizers, Plant, Growth New York Agricultural Experiment Station. Bulletin No. 473 .