Home > Investigations in soil management: Part I. Amount of plant food readily recoverable from soils with distilled water. Part II. Relation of crop yields to the amounts of water-soluble plant-food materials recovered from soils. Part III. Relation of differences of climatological environment to crop yields
Investigations in soil management: Part I. Amount of plant food readily recoverable from soils with distilled water. Part II. Relation of crop yields to the amounts of water-soluble plant-food materials recovered from soils. Part III. Relation of differences of climatological environment to crop yields
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