A high aggregation on account of increased silt and clay protects SOC from decomposition by trapping them between the aggregates. Soil organic carbon is essential for enhancing soil quality, sustaining and improving food production, maintaining clean water, reducing CO2 in the atmosphere and an effective soil quality indicator. Its concentration influences physical, chemical and biological qualities of soils, quality and quantity of biological produce. Soil organic carbon (SOC) is the predominant parameter that affects other physical, chemical, and biological properties of soils. Cultivation generally depletes one third to half SOC, depending upon soil texture, erosion, and vegetative cover, management regime, initial concentration, period of fallowing and inorganic carbon accumulation. Available phosphorus and potassium were reported to increase with the stability of organic carbon and vice versa. Sodium adsorption on clay complex increased with SOC depletion. Thus soil organic carbon is dynamic and a widely accepted indicator, changing with land use and management history.
With warm regards,