The current study was carried out at Agricultural College, University of Baghdad in the vegetable farm / Department of Horticulture during 2012 autumn growing season. The objective of the study was to estimate the crop water requirement under different treatment of water quality, growth and yield of potato. The experiment design was complete randomized block design in three replicates. The main plots were for replicates, and sub plots for irrigation treatment as follows: Irrigated with River water (1.25 dS. m-1) (RW), Saline water (4.00 dS. m-1) (SW) and Sequences irrigated (one irrigation river water + two irrigation saline water) (RW+SW). The treatment irrigation was imposed at 35% depletion of available water. Plant height, leaf area index, number of stems/plant and fresh weight accumulation were significantly hardly affected by the salinity treatments. Actual evapotranspiration for potatoes during autumn season was 527 mm. The treatment of RW+SW irrigation water reduced in the mount of applied fresh irrigation water about by 173 mm.
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