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A field experiment was conducted during the spring of 2015 in the Al-Chaksaliah village in Hit district -Anbar province in sandy Loam soil texture, to study water consumptive use in different ways under the drip irrigation system, style of addition on growth and yield of potatoes. Water consumption measured in four methods, depending on climatic data using Najib Kharofah equation, depending on evaporation pan and water tensiometer and moisture sensor, water added in two ways firstly addition depth once, for Added half the depth and the addition of the second half after 12 hours of The first add-on, the study treatments distributed in accordance with the randomized complete block design (RCBD) of three replicate. Potatoes were planted on 05/02/2015, was given five irrigations before germination and then was irrigation scheduling, where perfusion has operations at 40% depletion of available water using of tensiometer and moisture sensor with an irrigation intervals of three days when using Najib Kharofah and pan evaporation equation. The water consumption calculation and measurement of plant height, root length, dry weight, total yield and calculated the efficiency of water use.

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