S. K. PAREEK; V. K. SRIVASTAVA; M. L. MAHESHWARI; R. GUPTA. Effect of Azotobacter Cultures in Relation to Nitrogen Application on Growth, Yield and Alkaloidal Composition of Opium Poppy (Papaver Somniferum). IJA 2001, 41 (2), 41_2 . https://doi.org/10.59797/ija.v41i2.3658.