SINGH, MUNESHWAR; TRIPATHI, A K; KUNDU, S; TAKKAR, P N. Nitrogen requirement of soybean (Glycine max) - wheat (Triticum aestivum) cropping system and biological N fixation as influenced by integrated use of fertilizer N and farmyard manure in Typic Haplustert. The Indian Journal of Agricultural Sciences, Delhi, India, v. 69, n. 5, 2013. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/26762. Acesso em: 28 oct. 2025.