Data/hora: 17/06/2024 18:06:09

Provedor de dados: | 90
País: | Brazil
Título: | Potential acidity estimated by SMP pH in soils of the state of Pará
Autores: | Gama,Marcos André Piedade; Matos,Gilson Sergio Bastos de; Silva,George Rodrigues da; Brasil,Edilson Carvalho; Nunes,Otiniel Ferreira.
Data: | 2013-02-01
Ano: | 2013
Palavras-chave: | H + Al; Soil analysis; Amazon; Soil fertility.
Resumo: | The use of SMP pH to estimate the potential acidity (H + Al) is more practical than the method of 0.5 mol L-1 calcium acetate for routine laboratory analyses. The objective was to fit an equation to estimate the H + Al from SMP pH values of soils of the State of Pará. From various regions of the state, 177 soil samples were collected, in which the SMP pH was determined in 0.01 mol L-1 CaCl2 solution and H + Al in 0.5 mol L-1 calcium acetate and the results were related by regression analysis. The equation H + Al = 77.77 + 20.61 SMP pH - 1.435 SMP pH² (R² = 0.90) expressed the H + Al values (in cmol c dm-3) best. When the SMP pH values were used in equations referring to other regions or states in Brazil, the H +Al values were over- or underestimated. The potential acidity in soils of Pará can be estimated by the method of SMP pH.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000100020
Editor: | Sociedade Brasileira de Ciência do Solo
Relação: | 10.1590/S0100-06832013000100020
Formato: | text/html
Fonte: | Revista Brasileira de Ciência do Solo  v.37 n.1 2013
Fonte: | info:eu-repo/semantics/openAccess