Kushwaha, H.S.Mehra, Menka2016-07-122016-07-122010-02http://krishikosh.egranth.ac.in/handle/1/68624Thesis-PhDStudy was undertaken for scheduling of irrigation in European dill (Anethum graveolens L.) crop through field-lysimeter and field-plot experiments conducted during rabi seasons of 2007-08 and 2008-09 at Crop Research Centre of G. B. Pant University of Agriculture and Technology, Pantnagar Uttarakhand, (Latitude 290 N, longitude 79o 30’ E and altitude of 243.84 m above msl). The soil of lysimeters is silty clay loam in texture and is associated with shallow to deep water table conditions. While the soil of field plots is sandy loam in texture and is associated with very deep water table condition. Six irrigation treatments viz I0 (rainfed), I1 (one irrigation at 21 days after sowing, (DAS), I2 (two irrigations each at 21 and 42 DAS), I3 (irrigation at 40 per cent depletion of available soil moisture), I4 (irrigation at 60 per cent depletion of available soil moisture) and I5 (irrigation based on IW : CPE ratio as 0.6) were selected for the experiment to study the effect of irrigation on growth, development, yield and yield attributes of the crop in both field-lysimeters and in field-plots. All other standard agronomic and plant protection measures were followed to grow the crop during both the years. Results have shown that under lysimeter experiment, the highest plant height (131.4 and 131.9 cm) and maximum number of fruits per umbel on main shoot (1170.86 and 1199.61), primary branches (747.66 and 738.91), secondary branches (495.34 and 492.83) and tertiary branch (288.01 and 286.86) were found in I4 treatment in which irrigations were scheduled based on 60 per cent depletion of available soil moisture under 60 cm water table condition in field-lysimeters during 2007-08 and 2008-09, respectively. The minimum number of days taken by the crop for 50 % flowering was 95.75 and 95.50 under 30 cm, 95.25 and 94.25 under 60 cm and 94.75 and 94.00 under 90 cm water table during both these respective years. Highest seed yield of 2047 and 2194 kg ha-1 was obtained from the interaction of I4 with 60 cm water table during both these respective years. The highest water use efficiency of 37.12 and 38.65 kg ha-1 cm-1 was found in I4 under 60 cm water table during both these respective years. Under field experiment, highest plant height of 102.16 and 102.86 cm was found in I4 and was at par with I5, however, the maximum seed yield of 1725 and 1771 kg ha-1 was found under I4 irrigation treatment, being at par with I5 during 2007-08 and 2008-09, respectively. The organic carbon and available N, P and K in soil after the harvest of crop were found to be higher in I4 after compared with all other treatments Therefore, it can be concluded from this study that for obtaining optimum seed yield of European dill under medium (60 cm) water table, crop must be irrigated at 60 per cent depletion of available soil moisture.enwater table, Anethum graveolens, irrigation scheduling, field experimentation, soil properties, soil moisture, sandy soilsThesis