A field experiment was conducted at the Water Management Farm of CSK HPKV, Palampur during 2019-20 to study the effect of irrigation levels and weed management practices in cauliflower. It consisted of three irrigation levels (0.9 PE, 0.7 PE, 0.5 PE) in main plots and four weed management practices (black polythene mulch, pendimethalin @ 1.5 kg ha -1 followed by one hand weeding at 40-45 DAT, pendimethalin @ 1.5 kg ha -1 followed by straw mulching and weedy check) in sub plots laid out in split plot design replicated thrice. Drip water application at 0.7 PE irrigation level and the use of black polythene mulch as weed management practice being at par with 0.9 PE level and black polythene mulch gave significantly higher yield compared to irrigation at 0.5 PE. However, the weed count was significantly lower whereas water use efficiency was significantly higher at 0.7 PE irrigation level compared to irrigation at 0.9PE with black polythene mulch.

A field experiment was carried out at Palampur during the rabi season of 2017-18 with 12 treatment combinations of three irrigation levels (I1: Irrigation at 15 days interval at 0.8 CPE Cumulative pan evaporation), I2: Irrigation at 15 days interval at 0.6 CPE and I3: Rainfed) and four nutrient management practices (F1:100% NPK through inorganic sources, F2:10 t FYM + Rhizobium + Jeevamrit at 21 days interval, F3: 5 t FYM +50% NPK through inorganic source and F4:Zero budget farming (seed treatment with Bijamrit + Jeevamrit at 21 days interval) and control (Recommended package of practice + flood irrigation at 10 days interval). Water use efficiency (WUE) was significantly higher under rainfed condition. The higher yield attributes, yield, WUE and net returns were obtained with an irrigation.