Clay Mineralogy of Red and Black soils of Vegetable Growing area of Guntur District, Andhra Pradesh

摘要

Studies on six soil profiels representing black and red soils of vegetable growing area of Guntur District revealed that tjhe black soils were clay to clay loam in texture and exhibited relatively higher cation exchange and base saturation values thanred soils having sandjy clay to sandy loam texture. Black soils were dominated by smectite group of minerals with minor quantities of illite and kaolinite. Kaolinite was the major mineral follwed by illite In red soils, which did not contain any smectite minerals.