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Verma, D P and Singh, K D (1991) Changes in the nutrient status of soil caused by cropping and fertilization in a Typic Ustochrept. Fertilizer Research, 29. pp. 267-274. ISSN 0167-1731
Verma, D P and Singh, K D (1991) Changes in the nutrient status of soil caused by cropping and fertilization in a Typic Ustochrept. Fertilizer Research, 29. pp. 267-274. ISSN 0167-1731