Potential acidity by pH SMP method in Amazonas State, Brazil

Authors

  • Adônis Moreira
  • Márcia Pereira de Almeida
  • Danielle Gonçalves Costa
  • Lucilene Silva Santos

DOI:

https://doi.org/10.1590/S1678-3921.pab2004.v39.6741

Keywords:

edaphic factors, climatic factors, buffer solution, soil chemistry, mathematical model

Abstract

The objective of this work was to determine a mathematic model that estimates the potential acidity with pH SMP measured in water and in solution of CaCl2 0.01 mol L-1. Two hundred and forty six soil samples from several localities were utilized. Despite presenting a lower correlation coefficient (r = 0.89*), the equation H+Al = 30.646 - 3.848pH SMP, obtained in H2O, was more efficient than in the CaCl2 solution (H+Al = 30.155 -3.834pH SMP, r = 0.91*), since this last one underestimates the values of the potential acidity.

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Published

2004-01-01

How to Cite

Moreira, A., Almeida, M. P. de, Costa, D. G., & Santos, L. S. (2004). Potential acidity by pH SMP method in Amazonas State, Brazil. Pesquisa Agropecuaria Brasileira, 39(1), 89–92. https://doi.org/10.1590/S1678-3921.pab2004.v39.6741

Issue

v.39, n.1, jan. 2004

Section

SCIENTIFIC NOTES