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Relation of Commercial Fertilizer to Soil fertility Au: Carr, R.H.
Publication: Purdue Agriculturist
Subject: Soil Fertility
Date: 2/1915
v. 9, no. 5 p. 41
Publication: Purdue Agriculturist
Subject: Soil Fertility
Date: 2/1915
v. 9, no. 5 p. 41