Graphed DataSets
Year Soil Texture Rainfall Management Group Land Use Sample Size
All All < 550 mm/yr All All 38
Graph Additional DataSets
Cation Exchange Capacity - 0 - 10cm Overview

Cation exchange capacity indicates the ability of a soil to "hold" onto positively charged ions (cations) including plant nutrients such as potassium, calcium, magnesium and ammonium. The CEC is largely determined by clay content and organic matter. Clay has the greatest ability to hold cations, as it has a very large surface area compared to sand or silt (see Soil Texture in the Lab factsheet). Organic matter also has a high cation exchange capacity (up to 30 times greater than clay).

The soil quality indicator values presented here are “Effective CEC” values, which is calculated by summing the exchangeable base cations (Na+ , K+ , Mg2+ and Ca2+), as well as exchangeable aluminium (Al3+) and hydrogen (H+).

Choose a Soil Quality indicator from one of the three tabs below to examine grouped data.

Fact Sheets Related To
Cation Exchange Capacity - 0 - 10cm