Morphological and physicochemical properties of some alluvial soils of Assam

An examination of morphological features and physicochemical properties of five profiles of alluvial soils of Brahmaputra and Surma valleys of Assam has shown that upland levelled soils are devoid of mottlings and concretions and are moderately developed. Soils (Nowgong and Gauhati) affected by high water-table resulting in the formation of iron concretions and mottlings are weakly developed. Profiles of Brahmaputra valley indicate development of a weak argillic horizon. Surma valley (Cachar region) soils, which remain submerged for most part of the year, do not have iron concretions and show minimum horizon differentiation.