The study looked at soil carbon levels in different crops in Mayiladuthurai, India. They found that forests had the highest soil carbon, followed by rice-pulses, rice-cotton, and sugarcane. Most of the area had low to medium soil carbon levels. Soil carbon was linked to different types of carbon in the soil, showing that changing crops could affect carbon levels. Factors like root biomass, soil microbes, and nutrients influenced soil carbon. By managing the soil better, we can store more carbon and help fight climate change.