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地力常新壮说
释义
地力常新壮说
Encyclopedia
理学
〔古代农业思想〕
释
theory on everlasting of soil fertility
地力常新壮说
宋代陈旉对土壤肥料之科学总结,认为合理利用土壤、改良土壤和培肥土壤,土壤肥力不会减弱衰退,反而越种越肥,实现地力的常年新壮,驳斥了地力衰退论。
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U.S.Government Publishing Office
U-shaped
U-shaped cells
U-shaped curve
U-shaped distribution
U-shaped valley
Ushihara Kyohiko
Ushin
Ush Rebellion
USIA
U.S. Information Service
using allusions
using light in photography
using of insurance guaranty fund
using the guided positioning effect of saccharide compound
using warming and heat-clearing simultaneously
U.S.Invasion of Nicaragua
USIS
U.S.Labor Party
US-LTER
USM
Usman Awang
USMARC
Usmar Ismail
USMMA
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