Waterlogging and sodicity is common problem in many irrigation canal command areas. The water table management system is the next level of improving water management in irrigated agriculture. In the present study, the water table management system was designed to work effectively in the monsoon season as a controlled drainage system and sub-irrigation system during summer. The field evaluation of drain water quality analysis was carried out from the water table management system installed at A-block of Eastern Farm, Agricultural Engineering College and Research Institute, Kumulur farm, Trichy, Tamil Nadu during 2015-2016. The experiment was laid out in a split plot design with three replications. Four levels of drain spacing of drain pipes (7.5, 10, 12.5 and 15m) were the main plot treatment and two levels of depth and diameter of drain pipes (75 cm, 60 cm & 75 mm, 63 mm) were the sub plot treatments. The results showed that the recommended quality of press mud 2 t ha-1 was a help to reduce the Exchangeable sodium percentage (ESP) level of 33 to 28 percent when compared to other ameliorants. It was concluded that solubilization should be removed by providing drainage and brought to ESP level of less than 16 percent and 15 m drain spacing to adapt to reduce the ESP level below the critical.
Controlled drainage, Drainpipes, Exchangeable Sodium percentage, Pressmud, Sodicity, Subirrigation
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