Studies on optimization of subsurface drainage spacing

Effect of three subsurface drain spacings viz., 40, 60 and 80 m was studied on soil chemical properties namely soil salinity, pH and exchangeable sodium percentage (ESP). There was considerable decrease in soil salinity, pH and exchangeable sodium percentage (ESP) as a result of installation of sub-surface drianage system. There was non-significant improvement in these soil chemical properties with respect of different lateral spacings.