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Kanwar, J S and Youngdahl, L J (1985) Micronutrient needs of tropical food crops. Fertilizer Research, 7 (1-3). pp. 43-67. ISSN 0167-1731
Kanwar, J S and Youngdahl, L J (1985) Micronutrient needs of tropical food crops. Fertilizer Research, 7 (1-3). pp. 43-67. ISSN 0167-1731