CEC
Hi,
I was looking at the soil series chart. I am wondering..how do I know the CEC value given on the chart is high or low? For example, 2014 sample exam question #5, the first layer (Ap) has CEC of 36, how do I know if this is consider high or low?
Thank you!
Here are some general ranges of CEC (in cmolc/kg soil) for various soil orders
- Luvisols: 10-30 cmolc/kg soil
- Podzols: 10-20 cmolc/kg soil
- Solonetz: 15-30 cmolc/kg soil
- Chernozem: 20-40 cmolc/kg soil
- Vertisol: 35-50 cmolc/kg soil
- Organic soils: 130-150 cmolc/kg soil
There values are dependent on pH of soil, since portion of their CEC is due to organic matter, which changes with soil pH