Effects of urea and ammonium sulphate on the pH and nitrification in a dark red latosol

Authors

  • F.A.F. Mello USP; E.S.A. Luiz de Queiroz; Departamento de Solos, Geologia e Fertilizantes
  • E.L. de Possídio USP; E.S.A. Luiz de Queiroz; Departamento de Solos, Geologia e Fertilizantes
  • J.R. Pereira USP; E.S.A. Luiz de Queiroz; Departamento de Solos, Geologia e Fertilizantes
  • J.P. de Araújo USP; E.S.A. Luiz de Queiroz; Departamento de Solos, Geologia e Fertilizantes
  • L. Abramof USP; E.S.A. Luiz de Queiroz; Departamento de Solos, Geologia e Fertilizantes
  • O.A. Costa USP; E.S.A. Luiz de Queiroz; Departamento de Solos, Geologia e Fertilizantes

DOI:

https://doi.org/10.1590/S0071-12761980000100001

Abstract

The variation of pH and the production of nitrate were studied in a Dark Red Latosol, Guamium séries, in function of the addition of 200 and 400 ppm of N, as urea and ammonium sulphate in the presence and absence of Ca(0H)2, for a period of 30 days. The results obtained showed that the pH decreased with ammonium sulphate and increased with urea. The variations were observed even in the presence of Ca(0H)2. The production of nitrate increased with pH considering the same level and source of nitrogen.

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Published

1980-01-01

Issue

Vol. 37 No. 1 (1980)

Section

nd1474570153

How to Cite

Mello, F., Possídio, E. de, Pereira, J., Araújo, J. de, Abramof, L., & Costa, O. (1980). Effects of urea and ammonium sulphate on the pH and nitrification in a dark red latosol . Anais Da Escola Superior De Agricultura Luiz De Queiroz, 37(1), 1-10. https://doi.org/10.1590/S0071-12761980000100001