3. to adjust the area exist in two ways:• To adjust the level of the face.O adjustable facial clay, have a slope so that water flow toward the drainage canal.O convert decoration and Khan to the catchment and drainage.• Grooved lifting plants for fruit vegetable crops or perennials that provide high yields. If the results require irrigation water to prisons and water when the water in acid Groove arrangement. To raise the perennial crops or wood Fluting effect. Despite the flooding in that area. If there is a high risk, it should not be made, or may raise to pilot a short crop to grow, change, crop, or as a vegetable and renewable plants should be planted with rice.
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