A study was conducted at the Soil Salinity Research Centre, Trichy during 1986-1988 in two seasons to find out the efficiency of sub-surface drainage on reclamation of wet land sodic soil using rice ADT 36 Two levels of lateral spacing (10 m, 15 m) and two levels of depth of drains (60 cm, 90 cm) were incorporated in the experiment in a factorial randomised block design. The water used for irrigation and the soil types were sodic in nature. The clay pipes of 50 cm legth with 15 cm dia were used as drainage pipes. The plots with drain lines having lateral spacing 10 m burried at a depth 90 cm registered significantly the highest grain yield.
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