?PRODUCTIVITY OF RICE-WHEAT SYSTEM IN RELATION TOAZOLLA GREEN MANURE FERTILIZED WITH NITROGEN AND PHOSPHORUS. Biological Sciences - PJSIR, [S. l.], v. 41, n. 1, p. 32–35, 1998. Disponível em: http://www.v2.pjsir.org/index.php/biological-sciences/article/view/2226. Acesso em: 25 apr. 2026.