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S. VANDANA*, P.V.R.M REDDY, K.V. NAGAMADHURI AND P. MAHESWARA REDDY
Department of Soil Science and Agricultural Chemistry, S.V. Agricultural College, ANGRAU, Tirupati.
Two hundred fifty representative soil samples from seventy three villages of Gudipala mandal in Chittoor district of Andhra Pradesh were collected at 250 m grid interval leaving hills and water bodies and assessed for their fertility parameters. Fertility data was interpreted and statistical parameters viz., range, mean, standard deviation and coefficient of variation were calculated. Soils were moderately to highly alkaline, non-saline and soil organic carbon was low to very high. The available nitrogen (57.0- 305.0 kg ha-1) was low to medium, available phosphorus (20.0-85.0 kg ha-1) and potassium (201.0-416.0) was low to high and available sulphur (8.00-50.0 ppm) as deficient to sufficient. DTPA extractable micronutrients zinc (Zn), iron (Fe) and manganese (Mn) were deficient to sufficient range and whereas, available copper (Cu) was sufficient range in the study area. The fertility status of soils revealed that, the available N, S, Zn, Fe and Mn major soil fertility constraints.
alkaline soils, micro nutrients, soil fertility