Physiography and Soil Association in Rajasthan

Physiography-soil association relationship has been attempted for Rajasthan state. Physiographic regions are based on published literature and supplementation by authors' own study. Dominant range and description of major soils are given. Study showed that physiographic regions together with source rock variability are significant factors in governing distribution of soils. Eastern plain derived from schists and gneisses are dominated by Haplustalfs. Chappan plain derived from schists and shales has Ustochrepts and Chromusterts. Hadoti plateau formed from the allutium of Dec can basalts and Vindhyan shales has Chromusterts, Ustochrepts and Ustifiuvents. In western part parent material is important but climate is the dominant factor in highly restricted profile development.