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evaluation index system for cultivated land fertility
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evaluation index system for cultivated land fertility
Encyclopedia
农学
地力分级法
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evaluation index system for cultivated land fertility
地力分级法
利用土壤养分测试资料和田间试验结果,将土壤肥力分成若干等级,根据养分丰缺等级确定施肥建议的方法。
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gold and silver wares from the hoard of the Tang Dynasty at Hejiacun
gold and silver wares of the Liao Dynasty
gold and silver wares of the pre-Qin period
gold and silver wares of the Qin and Han Dynasties
gold and silver wares of the Song and Yuan Dynasties
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gold and silver wares of the Tang Dynasty
gold and silver wares of the Wei,Jin,and Southern and Northern Dynasties
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Goldbach
Goldbach comet
Goldbach conjecture
Goldbach number
Goldbach partition
Goldbach problem
Goldbach's conjecture
Goldbach theorem
Goldbach-type theorem
Goldbach-Vinogradov theorem
Goldbach-Waring problem
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