The Cation exchange capacity (CEC) section of the Soil Quality Knowledge Base explains what cation exchange capacity is and how it affects soil structural stability, nutrient availability, soil pH and the soil’s response to fertilisers. It discusses how cation exchange capacity is measured and how it is affected by different soil types and soil pH. Low cation exchange capacity can cause deficiencies in potassium, magnesium and other cations. Adding organic matter will increase cation exchange capacity but this process can take decades. This webpage contains a video, Ion exchange capacity of gravel soil [4:27] which explains both cation and anion exchange capacity. While the content focuses on Western Australia, the information is applicable to other Australian regions.#
This is a carefully curated database of important soil resources. The data base is not exhaustive but rather a library of the resources we believe are the most useful for the audience. Each resource has been added after careful consideration against our selection criteria, including but not limited to its scientific validity, accessibility, and readability. The library generally does not include most academic research papers but may include some open-source papers written in accessible English.
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SSA reminds users that these resources are a guide only. Our understanding of soil science is improving continuously so it is important to check the suitability of the information for your purpose with an appropriately qualified professional such as a Registered Soil Professional or a Certified Professional Soil ScientistÂ
