
Soil organic matter turnover is continuous, occurring at at annual rate of 2-4%.

How much organic carbon could the soil store? The carbon sequestration potential of Australian soil
Journal article
Soil is a huge carbon (C) reservoir, but where and how much extra C can be stored is unknown.

A simple method to visualise the amount of sand, silt, clay and organic matter in a soil sample
Video
Laboratory demonstration to help observe soil organic matter.