搜索结果: 1-7 共查到“林学 Caspian forests”相关记录7条 . 查询时间(0.066 秒)
Modelling and mapping of soil damage caused by harvesting in Caspian forests (Iran) using CART and RF data mining techniques
forestry operations hazard zoning spatial prediction timber skidding tree ensemble techniques
2018/3/6
Controlling the soil damage caused by forest harvesting has a key role in forest management due to its effect on forest
dynamics and productivity, mainly through modifying the physical, mechanical, a...
Dynamic growth models for continuous cover multi-species forestry in Iranian Caspian forests
forest statistics forest modelling growth function forest management
2018/3/6
This study concerns some of the relevant topics of the Iranian Caspian forestry planning problem, in particular the first
central components in this modelling process, such as forest modelling, fores...
Determination of forest skid trail density in Caspian forests, Iran
timber harvesting winching time study
2016/3/2
Calculation of Skid Trail Spacing (STS) is an important option to minimize the total costs of skidding. Construction of many skid trails increases the construction cost, it also results in more degrad...
Assessment of coarse woody debris following selective logging in Caspian forests: implications for conservation and management
line intersect method fixed-area plot beech forest
2015/4/24
Information on the amount, distribution, and characteristics of coarse woody debris (CWD) in forest ecosystems is highly demanded by wildlife biologists, fire specialists and ecologists. Owing to its ...
Felling and skidding damage to residual trees following selection cutting in Caspian forests of Iran
bole injury logging skidder tree damage uneven-aged stand
2015/4/24
The felling and skidding damage to residual trees was investigated in a selectively cutting operation in the Caspian forest of Iran. The logging operation was performed by chainsaw and cable skidder. ...
Productivity and cost of manual felling with a chainsaw in Caspian forests
chainsaw working efficiency unit cost
2015/3/17
A field production study was conducted for a manual harvesting system using a chainsaw in a Caspian hardwood forest site. A selective cut was performed on a 42-hectare tract with an average slope of 3...
Time study and skidding capacity of the wheeled skidder Timberjack 450C in Caspian forests
wheeled skidder Timberjack 450C working efficiency init cost skidding
2015/3/12
This study was carried out in a steep and difficult terrain. Trees were logged downhill to the landing by a wheeled skidder Timberjack 450C. Selection cutting was performed on a 66-hectare tract with ...
