A study was under taken in sericultural areas of semi-arid zone, to evaluate the effect of tillage system and green manure covering on the carbon conservation and its relationship with physical, chemical and biological properties of the soil on crop production,. The study revealed that the soil organic carbon content was significantly high at 0-15cm (1.03% -1.17%) >30cm (0.63 – 0.91%) > 45cm depth (0.27% - 0.60%) in different practices. The carbon content was showing the decreasing trend with increasing the depth of the soil irrespective of the soil treatments and tillage practices. Generally the soil organic carbon content in organically grown plots was high 1.10% and 1.17% with tillage(T1) and no tillage(T2) practices respectively followed by combination of organic + chemical application with tillage T3 (1.03%) and no tillage practices T4 (1.06%). The organic carbon values were observed in the order of T2 >T1 >T4 >T3 in surface soils. Similar trend was recorded with respect to the soil microbial populations. Regression analysis indicated bulk density was significantly reduced with increase in every unit of soil organic carbon (SOC) and negatively correlated by showing high r2 value.