Agricultural and Biological Sciences
8 years ago

Clay soil type affects respiration rates, impacting soil health and carbon storage.

Journal of soil science and plant nutrition
Respiration in mixes of sandy and clay soils: influence of clay type and addition rate
T.-T Nguye, Petra Marschner

Paper Summary

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Mixing sandy soil with different types of clay affects how much carbon is released through respiration. Smectite clay reduces carbon release more than kaolinite clay because it has a higher surface area and cation exchange capacity. This means that smectite clay can protect organic carbon from breaking down by binding to it.