Irrigability and Productivity Classifications of Some Typical Soils of Sedentary and Alluvial Origins

Six pedons occurring in a spatially differing area between Ranchi in south (sedentaly) and Madhubani in north Bihar (alluvial) were studied for evaluating irrigability and productivity potentials. The soils differed in irrigability classes and the differences are related to various soil limitations. Both, land and soil irrigability classes, show alignment with each other in their broader perspective. Pedons 1, 4, 5 and 6 fall under good productivity class whereas pedon 2 has average and pedon 3 poor productivity. The potential productivity class is excellent for pedons 4, 5 and 6 whereas good for pedons 1 and 2 but poor for pedon 3. The coefficient of productivity follows the order: Pedon 6> Pedon 2> Pedon 1 > Pedon 5> Pedon 4 > Pedon 3. These findings enable database to execute the reliable decision for effective land use planning and help to resolve the contrast on land surface significantly for maximizing production.