Standing water salinity and depth effects on dry season rice yield of Godavari delta

Influence of standing water salinity and depth on dry season rice yields were assessed in a typical Salt affected and water logged areas of Godavari Western Delta. Crop yield standing water depth (cm) and salinity (EC, dSm⁻¹) were monitored at weekly intervals in 48 locations at 100 x 100 m grid. Mean surface water salinity and depth of water were correlated with respective crop yields. Standing water salinity and depth were highly correlated (− 0.57 **) for dry season rice yield than standing water depth (−0.30*). Regression equations were developed for prediction of reduction in rice crop yield based on standing water salinity and standing water depth. Critical levels for 10%, 25% and 50% crop yield reduction for both standing water salinity and depth were established for dry season rice yield.