根据他的分析，一个国家的主食大体取决于其气候和土壤条件，这两个条件又与该国家的地理位置密不可分。
According to his analysis, the main foods eaten in any country depend largely on its climate and soil, both of which are closely related to the country's geographic position.
李茶间作茶园内定位观测和分析结果表明，影响茶叶产量和品质的小气候条件及土壤条件均得到了较大的改善。
Position observation and analysis showed that the microclimate and soil greatly affected the tea yield and quality in the tea garden intercropped with plum.
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