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J. JAGADISH, P.VEKATA RAM MUNI REDDY*, K.V. NAGA MADHURI AND Y. REDDI RAMU
Department of Soil Science and Agricultural Chemistry, S.V. Agricultural College, ANGRAU,Tirupati-517 502, Chittoor Dt., A.P.
Geo referenced soil samples were collected from 29 villages of Nagari mandal in Chittoor district of Andhra Pradesh at ten ha grid interval following spatially balanced sampling technique. The coordinates of the sampling sites were collected by using GPS receiver. The soil samples were analyzed for various soil fertility parameters by adopting standard procedures. Analytical and statistical parameters such as range, mean, average, standard deviation and coefficient of variation were calculated. Soil fertility maps were prepared using Arc GIS 10 software. Soils were slightly to strongly alkaline in reaction with non saline in nature. Soil organic carbon per cent was medium to high. Available nitrogen was low, available phosphorus was low to high, available potassium was medium to high. By creating the fertility maps it has been concluded that these nutrients play major role in crop development.
Nutrient mapping, remote sensing, GIS, soil fertility.