Researchers studied soil organic carbon in different sizes of soil aggregates under Tamrindus forests in a dry-hot valley. They found that smaller aggregates had higher organic carbon content than larger ones. Different planting patterns of Tamrindus forests also affected organic carbon levels, with Tamrindus+local herbs having the highest content. Tamrindus+Paspalum natatu was next, while Tamrindus+Phyllanthi emblice had the lowest. Organic carbon content in the soil layers did not change much in bare land.