The field experiment was conducted on loamy sand soils of Agronomy Instructional Farm, C. P. College of Agriculture, S. D. Agricultural University, Sardarkrushinagar (Gujarat) during the years 2012-13 and 2013-14 to study influence of resource conservation techniques on organic carbon and physico-chemical properties of soil. The soil of the experimental plot was low in organic carbon (0.20 %) and available nitrogen, medium in available phosphorus and potash with particle density of 2.784 g/cc and bulk density of 1.639 g/cc. The experiment was laid out in split plot design with three replications. Sixteen treatment combinations (Table 2) were evaluated in the study. Cotton - summer pearlmillet cropping system recorded significantly the highest organic carbon and porosity at end of crop sequence. EC, pH, particle density and bulk density were found to be non significant among the different cropping system treatments. Residue incorporation secured top position by recording significantly the highest organic carbon and porosity as well as the lowest bulk density at the end of the cropping sequence. In the case of EC and pH as well as particle density, residue incorporation treatment did not excrete any significant effect. The application of 75 % RDN through inorganic fertilizer + 25 % RDN through FYM was found significantly superior by recording the highest organic carbon and porosity as well as the lowest bulk density at the end of the cropping sequence. In the case of EC, pH and particle density, fertilizer treatments were found to be non-significant.