[1]
F. Mello, E. de Possídio, J. Pereira, J. de Araújo, L. Abramof, and O. Costa, “ Effects of urea and ammonium sulphate on the pH and nitrification in a dark red latosol ”, An. Esc. Super. Agr. Luiz de Queiroz, vol. 37, no. 1, pp. 1–10, Jan. 1980, doi: 10.1590/S0071-12761980000100001.