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Upadhyay, R.K. and Patra, D.D. and Tewari, S.K. (2011) Natural nitrification inhibitors for higher nitrogen use efficiency, crop yield, and for curtailing global warming. Journal of Tropical Agriculture, 49 (1-2). pp. 19-24. ISSN 0971-636X
Upadhyay, R.K. and Baksh, H and Patra, D D and Tewari, S K and Sharma, S K and Katiyar, R S (2012) Integrated weed management of medicinal plants in India. International Journal of Medicinal and Aromatic Plants , 1 (2). pp. 51-56. ISSN 2249–4340