Effect of Different Level of Drip Irrigation on Growth, Yield and Water use Efficiency of Okra (Abelmoschus esculentus L.)

A field experiment was conducted at Zonal Research Station, Darisai, East Singhbhum, Jharkhand during 2016-2017 to estimate the water requirement for increasing the productivity of okra. The experiments were laid out in Randomized Block Design with five treatments which included four level of drip irrigation viz., 100, 80, 60 and 40 per cent evapotranspiration (ET) and surface irrigation at 1.0 IW/CPE and were replicated thrice. The results revealed that higher yields (160.52 q ha^-1) was recorded in treatment T₁- Drip irrigation at 100 per cent ET with maximum plant height (102.6 cm) and number of branches plant^-1 (2.08) and was significantly superior over rest treatment. The water use efficiency of 58.34 kg/ha/mm was recorded in drip irrigation at 40 per cent ET. The maximum benefit-cost ratio (1.40) was noted in T₁- Drip irrigation at 100 per cent ET and minimum (0.61) in T₄ - Drip irrigation at 40 per cent ET.