The effective cation exchange capacity (ECEC) is defined as the total amount of exchangeable cations, which are mostly sodium, potassium, calcium and magnesium (hereafter collectively termed as bases) in non-acidic soils and bases plus aluminum in acidic soils.
Also know, how is cation exchange capacity measured?
Defining Cation Exchange Capacity. Cations held on the clay and organic matter particles in soils can be replaced by other cations; thus, they are exchangeable. CEC is measured in millequivalents per 100 grams of soil (meq/100g). A meq is the number of ions which total a specific quantity of electrical charges.
How does pH affect cation exchange capacity?
The total number of cations a soil can hold is the soil's CEC. Higher CEC value of a soil indicates higher negative charge and the greater capacity of that soil to hold more cations. The relative proportion of acidic and alkaline or basic ions on the exchange sites determines a soil's pH value.
What is CEC on a soil test?
Cation Exchange Capacity (CEC) CEC, as reported by nearly all soil testing laboratories, is a calculated value that is an estimate of the soils ability to attract, retain, and exchange cation elements. It is reported in millequivalents per 100 grams of soil (meq/100g).
You May Like Also