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Ramakrishna, A and Ong, C K and Reddy, S L N (1991) Integrated weed management for rainfed groundnut. Journal of Plant Protection in Tropics, 8 (2). pp. 111-119.
Ramakrishna, A and Ong, C K and Reddy, S L N (1991) Studies on integrated weed management in sorghum. Tropical Pest Management, 37 (2). pp. 159-161. ISSN 0143-6147
Ramakrishna, A and Ong, C K and Reddy, S L N (1992) Canopy Duration and Structure of Pigeonpea Intercropped with Upland Rice. Experimental Agriculture, 28. pp. 295-307. ISSN 0014-4797
Ramakrishna, A and Rupela, O P and Reddy, S L N and Sivaramakrishna, C (1992) Promising herbicides for weed control in chickpea. International Journal of Pest Management, 38 (4). pp. 398-399. ISSN 0967-0874