Aridisols generally contain more organic matter than Mollisols.

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Aridisols are soils found in dry climates that have low organic matter content due to the limited vegetation and decomposition rates in those environments. Mollisols, on the other hand, are fertile soils found in grasslands and prairies that have high organic matter content due to the large amounts of plant growth and decay in those ecosystems. Therefore, Mollisols generally contain more organic matter than Aridisols.

Aridisols Generally Contain More Organic Matter Than Mollisols