| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for field restoration which is ameliorated so that a replant failure is prevented before it happens. SOLUTION: A plow layer is repeatedly mixed with water on a field to clean the plow layer. After the cleaning of the plow layer, an aqueous solution collected on the field is drained by natural draining. Since residual components of chemical fertilizer and agrochemical and components of insecticide, etc. used in upland farming, etc., can be removed from the plow layer, the concentrations of the chemical fertilizer and the agrochemical in the plow layer are reduced and a replant failure can be prevented before it happens.
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