investigation of weed species
investigation of weed species
杂草种类调查
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Investigation on the weed species and control techniques were done in 2001-2003. Speices and community distribution of weed had been found in farmland in Huaibei area.
2003年，进行了农田杂草调查及防治技术研究，基本摸清了淮北地区农田杂草种类和群落分布。
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