EFFECT OF SOIL-MANAGEMENT PRACTICES ON STATUS OF SOIL MINERALS OF POTATO (SOLANUM-TUBEROSUM) FIELD

The effect of different management practices on the status of mineral nutrients of potato (Solanum tuberosum L.) field was studied at Shillo ng in 1985 and 1986. Maximum amount (50.50%) of moisture content was r ecorded from valley land, followed by terrace land and upland. Higher concentration of organic carbon, total nitrogen and available phosphor us was found in valley land (4.42, 0.25 and 0.06%) and minimum (1.94, 0.17 and 0.01%) in upland soil. Exchangeable potassium was higher (0.0 8%) in terrace land, followed by upland (0.07%) and valley land (0.04% ) soils. Generally the concentration of minerals was higher in surface soil (0-10 cm), which decreased with increase in soil depth.