الفهرس 
Trrigation methodesOnly 14 pages are availabe for public view
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Abstract
Modifying A Pop-up Sprinkler to Give A Square Wetting Shape .when operation normal pope-up sprinklers inside a square area , the water is pushed in a diagonal direction . The formation of wetting is circle and its center is the position of the sprinkler. Overlapping must be done between the wetted circles of to avoid non- irrigated area of 22 %.