搜索结果: 16-18 共查到“林业基础学科 timber”相关记录18条 . 查询时间(0.078 秒)
Soil compaction in timber skidding in winter conditions
soil compaction multipass skid trail timber skidding water-air soil characteristics
2009/2/7
The research of soil compaction in timber skidding was carried out on two skid trails of uniform slope –15%and 30 %. The degree of soil compaction is shown by changes of water-air soil characteristi...
Probability of Occurrence of Soil Disturbances during Timber Harvesting
timber harvesting soil disturbance probability modeling
2009/2/7
This paper deals with the probability of occurrence of soil disturbance during timber harvesting operations. Studies were carried out in southern Poland in 26 stands differing in terrain, skidding m...
Linking ecologically based productivity information to timber supply analysis units using site series sampling
allowable annual cut analysis units ecological site series long-term harvesting level site index
2009/2/5
Timber supply analyses are used to estimate the possible harvest level of timber volume over the long term. Site index is one of the inputs of these analyses. When site index is underestimated, as is ...