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). Indian Journal of Agronomy, [S. l.], v. 41, n. 2, p. 41_2 , 2001. DOI: 10.59797/ija.v41i2.3658. Disponível em: https://pub.isa-india.in/index.php/ija/article/view/3658. Acesso em: 26 jun. 2026.