Ammonia volatilization from urea as affected by humic substances derived from palm oil mill effluent (POME) and tropical peat. (13). Tropical Agriculture, [S. l.], v. 77, n. 1, 2000. Disponível em: https://journals.sta.uwi.edu/ojs/index.php/ta/article/view/1431.. Acesso em: 10 dec. 2023.