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!

LiYunHsu (talk)‎

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

MajaKrzic (talk)‎