Rice yield and productivity enhancement is a consequence of increased soil carbon. Rice yield and productivity enhancement is a consequence of increased soil carbon which has an important social and economic bearing on the livelihood of people. Soil carbon plays a pivotal role in sustaining rice productivity and ecological stability. Indicators of soil quality are derived from the labile pools of soil organic carbon. Rising awareness and alarm over increasing atmospheric CO2 levels impacting renewed interest regarding the sink potential of soil organic carbon (SOC). Carbon sequestration in agricultural soils has three situations i.e. potential, attainable and actual. The research was designed in a Randomized Block Design (RBD), arranged in three replications and treatments included the growing environment of rice which is transplanted, puddled rice. And three replications and four treatments (Control, TP, SRI and DSR) for the field A3(a) & for B7(a) field. Hyderabad’s climate is tropical characterized by dry, hot summers and mild winters. Investigation entitled “Studies on carbon pools and stocks under different rice establishment methods” was conducted during Kharif season of 2024. The different C fractions were estimated through a modified Walkley and Black method as described. The results of the present study revealed that the soil organic carbon content in soil across the different soil depths studied (0-20, 20-40 and 40-60 cm) varied from 0.22 to 0.46%. Among them, non- significantly increased soil organic carbon in soil (0.46%) was observed with System of rice Intensification method followed by Direct seeded rice method (0.45%) and Transplanted Rice (TP) method (0.45%) compared to control (0.42%) at (0-20 cm) soil depth. The results of the present study revealed that the non-labile carbon content in soil across the different soil depths studied (0-20, 20-40 and 40-60 cm) varied from 0.07 to 0.56%. Among them, significantly higher value of non-labile carbon in soil (0.54%) with SRI and DSR methods compared to TP method (0.14) at (0-20 cm) soil depth. Significantly increased the non-labile carbon content in soil with SRI (0.50%), compared to control (0.12%) at (20-40 cm) soil depth. Significantly increased the non-labile carbon content in soil with DSR method (0.56%), compared to TP method (0.07%) at (40-60 cm) soil depths.