Vol. 12, Issue 4 (2023)

Author(s):
Sahana, H Veeresh, K Narayana Rao, SN Bhat and BS Polisgowdar

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 bulk density (BD) and maximum water holding (MWHC) capacity of pre-drainage soil samples was ranged from 1.20 to 1.67 Mg m^-3 and 39.91 to 51.62 percent respectively and BD was reduced in post-drainage soil samples i.e., 1.22 to 1.63 Mg m^-3 while there is a increase in MWHC of post-drainage soil samples i.e., 41.68 to 51.92 percent. Similarly the mean values of pH, Ec, TSS and ESP of pre-drainage soil samples was 7.80 to 8.48, 15.70 to 26.00 dS m^-1, 3.82 to 6.32 and 9.49 to 24.14 percent respectively, while it was in reduced in post-drainage soil samples i.e., 7.52 to 8.40, 9.46 to 20.16 dS m^-1, 2.30 to 4.90 and 8.39 to 19.27 percent for pH, Ec, TSS, and ESP respectively. The mean values of exchangeable cations i.e., Ca+Mg, Na andK of pre-drainage soil samples was 35.20 to 46.97 meq 100 g^-1, 4.74 to 12.46 meq 100 g^-1 and 0.46 to 0.66 meq 100 g^-1 respectively and it was reduced in post-drainage soil samples i.e., 30.48 to 42.70 meq 100 g^-1, 3.48 to 8.49 meq 100 g^-1, 0.48 to 0.74 meq 100 g^-1 for Ca+Mg, Na andK respectively.