Resumo

BEROISA, Carolina; KLOSTER, Nanci  e  ITURRI, Laura Antonela. MEASUREMENT OF EXCHANGEABLE CATIONS IN SALT-AFFECTED SOILS OF THE SEMIARID PAMPEAN REGION. Cienc. suelo [online]. 2023, vol.41, n.1, pp.185-195.  Epub 30-Nov-2023. ISSN 1850-2067.

The determination of exchangeable cations in salt- and/or sodium-affected soils using ammonium acetate does not allow to distinguish between exchangeable cations and their forms in soil solution. To quantify only the exchangeable cations in this type of soils, two alternative methods were evaluated: 1) pre-washing with ethanol of the ions in soil solution and 2) difference between the cations extracted with ammonium acetate and in the saturated soil paste extract. The alternative methods allowed to quantify calcium, magnesium and sodium in < 40 dS m-1electrical conductivity soils. Due to operative simplicity, method 1 proved to be the best alternative.

Palavras-chave : bases saturation percent; exchangeable sodium percent; sodium.

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