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对玉米田间杂草普查 ,初步查清本地区玉米田杂草种类及分布状况 ,调查表明 :不同类型玉米田 ,主要杂草种群不同
The survey of weed in corn field, preliminary find out the types and distribution of weeds in corn field in this area, the survey shows that: different types of corn fields, the main weed population is different