农学 >>> 林学 >>> 经济林学 >>>
搜索结果: 1-3 共查到经济林学 evaluation相关记录3条 . 查询时间(0.146 秒)
The material basis of nutshells was explored in this study for Camellia oleifera Abel, Castanea mollissima Blume, and Carya cathayensis Sarg., The authors measured the moisture content, pH, electronic...
The life cycle operation phase of John Deere 1490D energy wood harvester from the aspect of energy audit and environmentally negative influence caused by emissions were evaluated. Energy audit quantif...
For sanitary reasons, spruce trees affected by bark beetles (Ips typographus L.) should be re¬moved out of the stand as soon as possible, to avoid the propagation of the beetles to healthy trees. ...

中国研究生教育排行榜-

正在加载...

中国学术期刊排行榜-

正在加载...

世界大学科研机构排行榜-

正在加载...

中国大学排行榜-

正在加载...

人 物-

正在加载...

课 件-

正在加载...

视听资料-

正在加载...

研招资料 -

正在加载...

知识要闻-

正在加载...

国际动态-

正在加载...

会议中心-

正在加载...

学术指南-

正在加载...

学术站点-

正在加载...