Effect of Subsurface Drainage on Water Soluble Ions of Saline Vertisol Under TBP Command Area

Author: Sahana, H. Veeresh, K. Narayana Rao, S.N. Bhat and B.S. Polisgowdar

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Abstract

A study was conducted to ensure the impact of subsurface drainage system on salt affected soils in the TBP command area, Karnataka. The mean values of water soluble cations i.e., Ca+ Mg, Na and K of pre-drainage soil samples was ranged from 8.12 to 20.02, 26.37 to 44.19 and 0.24 to 0.35 meq 100 g-1 respectively and it was reduced in post- drainage soil samples i.e., 3.26 to 11.86, 11.08 to 32.09, 0.16 to 0.28 meq 100 g-1 for Ca+Mg, Na and K respectively. Similarly the mean values of SAR and water soluble anions i.e., Cl- , SO42- and HCO3- of pre-drainage soil samples was ranged from 8.23 to 14.41, 37.14 to 65.76, 18.39 to 37.86 and 2.13 to 3.12 meq 100 g-1 respectively it was reduced in post- drainage soil samples i.e., 5.46 to 12.19, 19.95 to 38.13, 10.82 to 31.55 and 1.27 to 1.72 meq 100 g-1 for Cl–, SO42- and HCO3- respectively. The concentration of SAR, water soluble cations and anions in the post-drainage soil samples was reduced in all the depths than that of corresponding dept

Keywords

SSD, post- drainage, post-drainage, SAR, water soluble cations, water soluble anions