| 摘要 |
PROBLEM TO BE SOLVED: To provide a soil structure for planting maintaining both pH and water content suitable for plant growth. SOLUTION: This soil structure 1 for planting is such that, on acidic soil 2 spread in a marshland, a drainable neutralizing bed 8 made of concrete debris 3 is formed, and on the bed 8, soil 4 is dressed to form a planting bed 5 for growing a plant therein, wherein the block size of the concrete debris 3 and the thickness of the neutralizing bed 8 may be determined as appropriate so as to form gaps among the concrete debris 3 to secure sufficient drainage function and secure neutralizing effect owing to the alkaline component in the concrete debris 3 whereas desirable by in the early stages when the plant is not sufficiently grown yet, acidic water from the acidic soil 2 is neutralized in the drainable neutralizing bed 8 and then supplied to the planting bed 5 by the aid of capillarity.
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