To determine the cation exchange capacity (CEC), calculate the milliequivalents of H, K, Mg, and Ca per 100g of soil (meq/100g soil) by using the following formulas: H, meq/100g soil = 8 (8.00 - buffer pH) K, meq/100g soil = lbs/acre extracted K ÷ 782. Mg, meq/100g soil = lbs/acre extracted Mg ÷ 240.
How do you calculate acid saturation?
Base Saturation
- Base Saturation (%) = (Base cations/CEC) x 100.
- Calcium Saturation (%) = (Calcium cations/CEC) x 100.
- Cation exchange capacity (CEC) = Base cations + Acid cations =12.4 + 4.8.
- Base Saturation (%) = (Base cations/CEC) x 100.
- = (12.4/17.2) x 100.
- Calcium Saturation (%) = (Calcium cations/CEC) x 100.
What is the value of CEC?
Typical CEC Values in Soils
In most soil reports, CEC is expressed as milliequivalents (meq) of charge (number of charges) per 100 grams of soil (meq/100 g or as cmol/kg when using International Scientific Units). The number of milliequivalents is used rather than a weight (pounds, grams, etc.)
