Nguyễn Khang, Tô Cẩm tú, Lê Nhị Thuỷ (trang 111-115)
Từ khoá: hệ số K, trao đổi cation, cation, CEC, sét
Scientific basis for calculating K coefficient in order to define cation exchange capacity (CEC) in clay
FAO-UNESCO suggested formula calculating CEC: CEC (clay) =CEC (soil)/CEC (clay) x 100 – 3,5%C.
We have suggested 2 methods calculating CEC (clay) in Vietnam condition. Offer to use one of two formulas calculating CEC (by theorical method or by defining K coefficient in the table) in Vietnam condition.