SCIENCE|natural and applied sciences|earth sciences|soil science|soil analysis
- acmhainn malartaithe caitian Tagairt Faomhadh an téarma seo mar chuid de Thionscadal Lex
- ga
- cumas malartaithe caitian Tagairt Faomhadh an téarma seo mar chuid de Thionscadal Lex
- ga
- cation exchange capacity | CEC | soil cation exchange capacity
- en
- Sainmhíniú total capacity of a soil to hold exchangeable cations Tagairt "Soil Quality. 'Cations and Cation Exchange Capacity' (31.1.2023)"
- Nóta The main ions associated with CEC in soils are the exchangeable cations calcium (Ca2+), magnesium (Mg2+), sodium (Na+) and potassium (K+) (Rayment and Higginson 1992), and are generally referred to as the base cations. In most cases, summing the analysed base cations gives an adequate measure of CEC (‘CEC by bases’). However, as soils become more acidic these cations are replaced by H+, Al3+ and Mn2+, and common methods will produce CEC values much higher than what occurs in the field (McKenzie et al. 2004). This ‘exchange acidity’ needs to be included when summing the base cations and this measurement is referred to as effective CEC (ECEC).