3. to adjust the area there are 2 ways to adjust the level of surface soil with the soil surface, with adjustable tilt, so the water flows towards the drainage canal. Decorate and transform new canna catchment and drainage. The raised grooves for vegetable crops, planting fruit trees or trees that give 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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