Tal is recognised as a saucer shaped physiography inundated with water for 2 to 4 months in which soils are developed on back-water deposition of the rivers. The soils of tal land in the old alluwial region are characterized by neutral to slightly alkaline reaction, dark brown to very dark greyish brown; colour, clayey texture, low organic matter, high CEC, relatively lower silica and higher sesquioxide content, somewhat showing typical characteristics of Vertisols. They have developed on alluvium of different sources in a saucer shaped physiography under basic environment and impeded drainage condition. The narrow variation in organic carbon, clay and CEC within the pedons are indicative of homogenization due to argillipedoturbation. The specific feature of interseciing slickensides forming parallel epipeds with cyclicped on designated these tal land soils as Vertisols.
The tal land soils of young alluvial region are characterized by slightly acidic to neutral reaction, grey to very dark grey colour, clay to clay loam texture with lithological discontinuity, high organic carbon, relatively lower CEC, higher silica and lower sesquioxide content than the tal land soils of old alluvial region. They have developed on alluvium of different nature from varied sources in depression around Kaber lake showing recent orgin of the soils.
Based on the morphological, physical and chemical properties, that tall and soils of old alluvial region are classified as Typic/Entic Chromusterts and tal land soils ofyoung alluvial regions as Vertic/Aquic Ustorthents.
Tal land, old and young alluvium, argillipedoturbation
