搜索结果: 1-8 共查到“知识库 林学 northern Iran”相关记录8条 . 查询时间(0.147 秒)
Estimation of biomass and carbon storage of tree plantations in northern Iran
aboveground biomass generic methods
2015/5/5
To estimate the aboveground biomass and carbon storage in multi-species plantations we used speciesspecific equations method and three other generic methods. Astara county is located in northern Iran....
Forest management and snag characteristics in Northern Iran lowland forests
biodiversity broadleaved forests
2015/5/5
Some snag characteristics were studied in three different Hyrcanian lowland forests. The highest snag
density (38.4 stem·ha–1) was found in fully protected forests, and it was significantly higher t...
Time consumption and productivity analysis of timber trucking using two kinds of trucks in northern Iran
Hyrcanian forest Iran secondary transportation productivity cost
2015/4/24
Increasing productivity and reducing cost in long-distance transportation have become increasingly important in the logistics of forest harvesting operations. This paper presents the research results ...
Evaluation of full tree skidding by HSM-904 skidder in patch cutting of aspen plantation in Northern Iran
time consumption HSM-904 skidder skidding cost
2015/4/14
This paper presents research results of the performance of HSM-904 grapple skidder using a full tree harvesting method in a non-native aspen Populus deltoides plantation in even terrain conditions in ...
Characteristics of coarse woody debris in successional stages of natural beech (Fagus orientalis) forests of Northern Iran
coarse woody debris Fagus orientalis Lipsky forest succession natural beech forest Northern Iran
2015/3/20
Coarse woody debris (CWD) is an important structural and functional component in forests in Northern Iran. In this study we determine the temporal patterns of CWD in Kheyroud Forests by examining the ...
Rutting and soil displacement caused by 450C Timber Jack wheeled skidder (Asalem forest northern Iran)
soil displacement rutting skid trail
2015/3/16
The use of skidding machinery in logging operations causes destructive effects especially on soil but has many advantages such as extracting long and heavy logs, optimum use of useful logging time and...
Soil compaction caused by 450C Timber Jack wheeled skidder (Shefarood forest, northern Iran)
soil compaction forest soil wheeled skidder
2015/3/6
In forest harvesting operations usually after using skidding machinery (skidders), traces of soil damage in the form of soil compaction and wheel and logs ruts can be seen in the forest soil. Soil bul...
Effects of utilized trees’ diameter on the residual stand in the Savadkooh forest in Northern Iran
Damage utilization residual stand diameter classes D.B.H
2011/1/11
Cutting of trees, like other stages of utilization, causes many damages to the residual stand. Recognition of the type and severity of damages and the factors causing such damages may be important.