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maaparandus
form.
environ.
土地开垦
通过改变土地的整体特征,如对过分湿地的排水、干旱半干旱土地的灌溉,或从重新开垦被海洋、湖泊和河流淹没的土地,使土地具有被进一步集约利用的能力。
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土壤改良
保护土壤使其免遭过度侵蚀,使土壤更加肥沃,更加具有生产效率的过程。
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