Neptune, A. et al. 1980. Nitrate leaching from soil columns in presence of ammonium sulphate ((NH4)2SO4) and N-Serve 24E(Nitrapyrin) . Anais da Escola Superior de Agricultura Luiz de Queiroz. 37, 2 (Jan. 1980), 991–1008. DOI:https://doi.org/10.1590/S0071-12761980000200026.