Impact on soil salinity and crop yield under traditional and controlled SSD system in saline vertisols of TBP irrigation command

Farmers at the tail-end of the TBP irrigation command facing water scarcity problem especially at the later part of crop growth are in practice of clogging the existing traditional SSD outlets so as to retain water in the field for the crop. This habit of practice leads to trouble the regular function of the SSD system. In order to avoid this habit adopt controlled drainage mode of technology to the existing traditional SSD system was the better option. Keeping this view performance study was conducted between traditional and controlled SSD with 40, 50 and 60 m spacing at Agricultural Research Station, Gangavathi during 2021-22.The results of the study reported that irrespective of the spacing under traditional and controlled SSD treatments salinity (EC_e) was reduced. The grain yield was increased from 33 to 48.3 (31%), 38 to 54.2(30%), 36 to 56.3 qha^-1 (36%) and 31 to 43.7 (29%),37.6 to 47.2 (20%),36 to 51.3 qha^-1 (30%) under traditional and controlled SSD at 40, 50 and 60 m spacing respectively. As concerned water scarcity issues especially in the downstream region can adopt this controlled SSD technology to the existing traditional SSD system helps to regular function of the SSD system.