Krishna, K. R. (2002). Soil fertility and crop production. Oxford & IBH Publishing Co. Pvt. Ltd..
Tohutoru Kātū Chicago (17th ed.)Krishna, K. R. Soil Fertility and Crop Production. New Delhi: Oxford & IBH Publishing Co. Pvt. Ltd., 2002.
Tohutoro MLA (9th ed.)Krishna, K. R. Soil Fertility and Crop Production. Oxford & IBH Publishing Co. Pvt. Ltd., 2002.
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