Kshirendra Kumar Mahanta
Central Soil Salinity Research Institute, India
Kshirendra Kumar Mahanta has completed his B. Tech (Agril. Engg.), M. Tech (SWCE) form College of Agril. Engg. & Tech., O.U.A.T., Bhubaneswar and PhD from Dept. of WRDM, IIT, Roorkee. He is working as Scientist (Soil & Water Conservation Engineering) at Central Soil Salinity Research Institute (ICAR) since 1999. He has published more than 15 papers in reputed journals and serving as a member of Executive council of Indian Society of Coastal Agricultural Research, Canning Town.
Improper land and water management has amplified the soil salinity problem across the world. In saline soil high concentration of soluble salts results in high soil permeability, thus, making soil physical conditions favorable for leaching. But the presence of excess Na+ ions in sodic soil makes the reclamation process more difficult and complex because the hydraulic conductivity and infiltration rate are often poor. The problem in sodic soil is for the electric double layer. More number of sodium ions is required to balance the deficit charges on the clay surface. Hence, the thickness of electric double layer in sodic soil is more than the non-sodic soil where multivalent ions are dominant. Most of the previous studies on reclamation of salt affected soils are field studies. A few analytical models were attempted without involving the interaction of ions and geometry of soil, hence failed. The electric double layer has hardly been taken into account for solving the reclamation problem of the sodic soil. As Na+ and Ca2+ ions are ions of concern for reclamation of the sodic soil, the interactions among these ions need to be considered through the electric double layer theory.