In recent years, there has been a loss of soil carbon due to improper soil and crop management practices. Worldwide, about 1417 grams of soil carbon are stored in the first meter of soil, and about 456 grams are contained in dead organic matter and vegetation.
The ability of soils to sequester CO2 is increased when they contain a high amount of organic matter. As an example of improper agronomic practices contributing to soil carbon loss in the form of CO2, improper tillage operations, crop rotations, residue management, fertilization, and similarly little or no use of organic fertilizers have all been responsible. About 25 to 30% of global GHG emissions from agriculture come from CO2, N2O, and CH4. Studies have shown that a combination of proper tillage operations, crop rotations leading to an improvement in soil organic matter, as well as organic amendments like FYM, compost and vermin-compost can significantly improve soil organic matter.