| 单词 | soil amelioration | 
| 释义 | > as lemmassoil amelioration   soil amelioration  n. ΚΠ 1969    Gloss. for Landscape Work 		(B.S.I.)	 v. 20  				Soil amelioration. 1972    Edwards  & Lofty Biol. Earthworms vii. 171 		(heading)	  				Soil amelioration by earthworms. < as lemmas  | 
	
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