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- [2] MAINTENANCE OF SOIL FERTILITY UNDER INTENSIVE MULTIPLE CROPPING IN NORTHERN INDIA INDIAN JOURNAL OF AGRICULTURAL SCIENCES, 1973, 43 (03): : 250 - 255
- [5] MULTIPLE CROPPING IN AUSTRALIA JOURNAL OF THE AUSTRALIAN INSTITUTE OF AGRICULTURAL SCIENCE, 1974, 40 (01): : 29 - 35
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