Seven well defined and distinct soil groups differing from one another in their geological formations and pedogenic characters have been recognized in the state. The main zonal and azonal soil formations of the state have developed within these broad soil groups. Each of these soil groups have developed under the combined influence of a wide range of soil forming factors including climate, vegetation and parent material. They show characteristically different agricultural conditions with respect to crop adaptability, fertility and management practices. Variations in macro-and micro –relief and the influence of pedogenic factors have contributed to the development of a number of soil associations in each of these tracts.