RT Journal Article T1 Evaluation of different moisture depletion levels for water productivity, yield and tuber size of potato under drip irrigation A1 Hassan, Syed Ijaz ul A1 Akram, Muhammad A1 Habib, Habibullah A1 Imran, Muhammad A1 Ahsan, Muhammad Naveed A1 Mehmood, Tahir T2 Journal of Horticultural Science & Technology AB A field experiment comprised of four different levels of management allowable depletion (MAD) of soil moisture for next irrigation to potato crop under drip irrigation was conducted during 2017-18 and repeated during 2018-19 at Water Management Research Farm, Renala Khurd, Okara, Pakistan. Cropwat 8.0 program was used to determine the interval and depth of next irrigation at 15, 30, 45 and 60% MAD of soil moisture. The experiments during both the years were organized in RCBD fashion with four replications. Irrigation to potato crop at 30% MAD level depicted the highest water productivity (17.28 kg/m3), followed by 60%, 15% and 45% MAD levels with water productivity values of 16.90, 16.63 and 14.60 kg/m3, respectively. The highest tuber yield was obtained when potato crop was irrigated at 60% MAD level (28.411 tons ha-1), followed by 30% MAD level (27.998 tons ha-1), 15% MAD level (26.736 tons ha-1) and 45% MAD level (24.081 tons ha-1). The maximum %age of medium sized tubers was achieved by applying irrigation to potato crop at 60% MAD level (65.70), followed by 30% MAD level (65.50), 45% MAD level (64.00) and 15% MAD level (60.50). The incidence of scab was found 2.50%, 2.75%, 3.25% and 3.75% in potato tubers at 15, 30, 45 and 60% MAD level, respectively indicating that the incidence of disease increased slightly with increase in MAD level. FD 2020 YR 2020 DO https://doi.org/10.46653/jhst2034105 VO 3 IS 4 SP 105 OP 108 JO J. Hortic. Sci. Technol. LA English SN 617-3220 UL http://www.pshsciences.org/publications/jhst/issues/3-4/2020-105/