Cation Exchange Capacity (CEC) Calculator
Calculate soil cation exchange capacity, base saturation percentage, and Ca:Mg ratio.
How to Use the CEC Calculator
- Enter exchangeable cations Ca, Mg, K, Na (meq/100g) from your soil test.
- Enter the exchangeable hydrogen H (meq/100g).
- Click Calculate to get CEC and derived indicators.
- Interpret results for liming and fertilization planning.
Casi d'Uso
- •Assessing soil buffering capacity and fertility.
- •Calculating lime requirement.
- •Diagnosing nutrient imbalances.
- •Agrochemical monitoring of agricultural land.
Formula
CEC = Ca + Mg + K + Na + H (meq/100g). Base saturation (%) = (Ca+Mg+K+Na) / CEC × 100. Ca:Mg = Ca/Mg.
Domande Frequenti
What is CEC?
Cation exchange capacity is the soil's ability to hold and exchange nutrient cations. Expressed in meq/100g of soil.
What is the optimal Ca:Mg ratio?
The optimal Ca:Mg ratio is 3-5:1. Higher values may indicate potential magnesium deficiency.
What is an optimal base saturation?
For most crops, 80-90% base saturation is optimal. Below 60% indicates soil acidification.