2024, Vol. 7, Special Issue 10

author(s)
Saurabh Pratap Singh, Pravesh Kumar, Hari Om, Sushil Kumar Pathak, Sunil Kumar, Sima Sinha, Shashibala, SK Bahera, Suborna Roychaudhary, Anupam Das, Mandhata Singh, SK Pandey, Seema and Santosh Kumar

abstract
The present investigation was conducted at Agronomy Research Farm of Bihar Agricultural University, Sabour Bhagalpur (Bihar) to study the effect of irrigation scheduling under different crop establishment methods on yield of wheat during Rabi season 2022-23. The experiment was laid out in Split Plot Design, replicated three times with treatment consisted of three crop establishment method viz. conventional tillage wheat sowing (T₁), zero tillage wheat sowing (T₂) and wheat sown on furrow irrigated raised bed (T₃) in main plot and three irrigation scheduling level based on IW/CPE ratio viz. 4 cm irrigation at 0.8 IW/CPE (I1). 5 cm irrigation at 1.0 IW/CPE (I2) and 6 cm irrigation at 1.2 IW/CPE (I3) in sub plots. Results showed that the different crop establishment methods the growth characters like no of tillers m-2 and dry matter accumulation m-2 recorded significantly superior at 60, 90 DAS and at harvest in FIRBs over all crop establishment methods applied, while in case of leaf area index it was found statistically at par with conventional tillage, however the plant height was not significantly influenced by crop establishment methods at all the crop growth stages. Significantly higher grain yield, achieved under conventional tillage method of crop establishment. In different irrigation scheduling treatments, in case of plant growth character like plant height, number of tillers, dry matter accumulation and LAI, there were no any significant difference were found between 5 cm irrigation at 1.0 IW/CPE and 6 cm irrigation at 1.2 IW/CPE and both treatments were found significantly superior over 4 cm irrigation at 0.8 IW/CPE ratio. Among different irrigation scheduling levels the irrigation depth of 5 cm irrigation at 1.0 IW/CPE ratio resulted in significantly higher grain yield. In crop establishment methods conventional tillage recorded the maximum water productivity, due to its higher yield over all treatments, while in case of irrigation scheduling the treatment 4 cm irrigation at 0.8 IW/CPE ratio was recorded significantly higher value of water productivity because the proportionate increase in grain yield was not recorded as the amount of water applied increases in other treatments. In different treatment combination highest water productivity was determined under conventional tillage method of crop establishment with 5 cm irrigation at 1.0 IW/CPE ratio.