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调查分析发现,近30a来秦都区麦田杂草经历了3个明显的演变过程,进而分析了演变的原因,提出了相应的防治对策。
The investigation and analysis showed that the wheat field weeds in Qindu area experienced three obvious evolution processes in the recent 30 years, and then analyzed the reasons for their evolution and put forward corresponding control measures.