| 摘要 |
PROBLEM TO BE SOLVED: To solve such problems that weed killing is required and needs heavy labor therefor in the case of manual weeding and adverse effects on human bodies by the use of herbicides cannot be denied, when vegetables and the like are cultivated in crop fields. SOLUTION: The structure 1 of plantation land comprises the concave area 9 formed on the ridge 3 made on the ground 5, the covering material 13 that covers the surroundings of the concave area 9 to inhibit weeds from growing therefrom and the soil 11 that is placed in the concave area 9 for growing the plants in the area 9.
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