Author(s):

DC Kala, HS Kushwaha, Maneesh Bhatt and Gangadhar Nanda

Abstract: Field experiments were conducted at N. E. Borloug Crop Research Center of the G. B. Pant University of Agriculture and Technology, Pantnagar during two rabi seasons of 2014-15 and 2015-16 in sandy loam soil with wheat cv. UP-2565 under three compaction levels (C) viz. no compaction (C₁), two passes of 500 kg RCC (reinforced cement concrete) roller (C₂) and four passes of roller (C₃); three irrigation schedules (I) viz. irrigation at 30% depletion from available soil moisture (ASM)- I₁, irrigation at 40% depletion from ASM- I₂ and irrigation at 50% depletion from ASM- I₃ at three dates of sowing (D) viz. 5 November (D₁), 20 November (D₂) and 5 December (D₃) with three replications. Maximum days to seedling emergence was recorded with D₃ (8.11) and C₃ (7.69) during 2015-16 while maximum days to anthesis and physiological maturity was recorded with D₁ (91.49 and 135.39, respectively), C₃ (90.12 and 131.85) and I₁ (87.96 and 129.37, respectively) during 2014-15. Accumulated GDD at maturity (^oC days) was recorded higher in D₁ (1500.31), C₃ (1514.83) and I₂ (1472.16) during 2014-15. Accumulated PTU at maturity (^oC days-hour) was also recorded higher with D₁ (8942.46), C₂ (9009.28) and I₂ (8646.85) during 2014-15. Highest value of HUE was recorded with D₃ (3.63), C₂ (3.32) and I₂ (3.27) during 2015-16. Grain yield (q ha^-1) was found higher during 2014-15 with D₃ (48.30), C₂ (47.07) and I₁ (45.88)

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