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cultivation regionalization
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cultivation regionalization
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农学
﹝经济林栽培﹞
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cultivation regionalization
栽培区划
根据自然条件、特点和方向的相似性,采用适地适树、资源优势、市场需求及土地资源合理利用等原则,对植物生产进行地理分布科学划分,为植物栽培和开发利用提供科学指导。
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permian period
Permian-Triassic boundary events
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