Identification of Soil Organic Nitrogen Substance Acting as Indicator of Response of Cocoa Plants to Nitrogen Fertilizer. Pelita Perkebunan (a Coffee and Cocoa Research Journal), [S. l.], v. 24, n. 2, 2008. Disponível em: https://mail.ccrjournal.com/index.php/ccrj/article/view/98. Acesso em: 1 may. 2026.