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An agronomic investigation to study the response of various mustard varieties to different irrigation scheduling treatments through critical growth stage approach was conducted during Rabi season of year 2019-20 at IFS research Unit farm in Banda University of Agriculture and Technology, Banda (U.P.-210001). The experiment was laid out in strip plot design with three replications. Four irrigation scheduling treatments [viz. I0: No Irrigation, I1: One Irrigation at Rosette stage, I2: One Irrigation at Pod formation and I3: Two Irrigations (1st at Rosette + 2nd at Pod Formation)] were allocated to horizontal plots; whereas two mustard varieties (viz. NRCHB-101 and PM-28) were sown in vertical plots. Higher yield attributing characters at different crop stages and at harvest viz. pod plant-1, pod length, grain pod-1 and test weight and yield (grain yield, straw yield, biological yield and harvest index) along with crop water use efficiency were recorded under treatment irrigating the crop with two times during rosette and pod formation. Similarly maximum gross return (93759 INR ha-1), net return (65238 INR ha-1) and benefit cast ratio (2.29) were recorded under two irrigations (1st at Rosette + 2nd at Pod Formation).  NRCHB-101 was observed maximum yield attributing characters and yield in compared to PM-28.

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