The field should be smooth. If logs or rocks should be removed, and should have a deep soil than 50 cm.If the soil organic matter is low. To improve the soil, manure, such as duck cow dung manure or manure, such as pea Po town or sludge filter (Filter cake). The rate of 20 tons / Rai, loosen the mix into soil.The rate of about 200 kg / ha.If the soil slope to slope protection block. The planting vetiver grass on soil embankment. If cant very cars soil must be frequent if cant low embankment away. To maintain the fertility of the soil on a long time.If the area is low, need to manage the drainage from flooding in the converter.
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