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K NAGARAJU, V MUNASWAMY*, T N V K V PRASAD, Y REDDI RAMU
Department of Soil Science and Agricultural Chemistry, S.V.Agricultural College,ANGRAU, Tirupati – 517502, Chittoor Dt., Andhra Pradesh, India
The soil samples collected from different districts of Andhra Pradesh were analyzed in the laboratory for physical, physico-chemical, electro-chemical properties. Five samples of black soils were collected from Kurnool, East Godavari, West Godavari, Krishna and Guntur districts and five soil samples of red soils from Anantapur, Kadapa, Chittoor, Vizianagaram and Visakhapatnam districts Andhra Pradesh. Clay particles from these soil samples were extracted using the International Pipette method. The texture of black soils in the study area ranged from clay loam to sandy clay loam whereas the textures of red soils were sandy clay loam. The black soils in the study area were acidic to slightly alkaline (5.5 to 8.0) in reaction and the red soils were neutral to slightly alkaline (6.51 to 7.9) in reaction. The black and red soils were non saline in nature. The cation exchange capacity of black soils in the study area ranged from 32.3 to 42.1 cmol (p+) kg-1 soil with a mean value of 37.6 cmol (p+) kg-1 soil, while in red soils it ranged from 15.6 to 17.2 cmol (p+) kg-1 soil with a mean value of 16.32 cmol (p+) kg-1 soil.
Texture, Sandy clay loam, Clay loam