Courses may include plant physiology, biochemistry, current pesticide regulations, forest pest suppression, chemical decontamination, and aquatic weed management.
课程包括植物生理学、生物化学、除虫剂使用规章、森林虫害预防、有害化学物质清理和水环境清理。
It is expatiated that harmfulness of weed, varieties and dosage of common weedicides, and use technique of weedicides in forest nurseries.
文章着重阐述了杂草的危害、苗圃常用的除草剂及用量、安全用药技术。
With forest branches and the trodden weed;
还有树枝，和践踏过的青草；
The young forest tending method is majorly adopted at the relative stable stage, whereas it is proper to loosen the soils and weed locally;
相对稳定期主要采取幼林抚育方法，而以局部松土除草为宜；
The young forest tending method is majorly adopted at the relative stable stage, whereas it is proper to loosen the soils and weed locally;
相对稳定期主要采取幼林抚育方法，而以局部松土除草为宜；
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