Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Mehrdad N"'
Publikováno v:
تحقیقات جنگل و صنوبر ایران, Vol 25, Iss 4, Pp 541-552 (2017)
The objectives of study were to compare different types of wood loss including breakage, split, slab, and high stump and also to investigate cut components such as, height and depth of undercut and back cut, notch, and width of hinge wood between the
Externí odkaz:
https://doaj.org/article/612aceb496af4a5aa2a35db87d76b897
Autor:
Mehrdad Nikooy, Farzam Tavankar
Publikováno v:
تحقیقات جنگل و صنوبر ایران, Vol 25, Iss 3, Pp 365-375 (2017)
Logging secondary damages on remained trees are one of the challenges in management of uneven-aged stands which have been less studied in the northern forests of Iran. In this research decay frequency and volume of bole trees after 15 years from woun
Externí odkaz:
https://doaj.org/article/0021f8dc8d5149f8955b9c8adafd2e9c
Publikováno v:
تحقیقات جنگل و صنوبر ایران, Vol 23, Iss 2, Pp 320-331 (2015)
Using machines such as hydraulic excavator and bulldozer is very common in construction of forest roads, and their costs have a major share from the hourly cost of a road construction project. Therefore, the estimation of production and costs of each
Externí odkaz:
https://doaj.org/article/55616d412ca442658ac3e9642b160d8f
Autor:
Mehrdad Nikooy, Hamid Amozadeh
Publikováno v:
تحقیقات جنگل و صنوبر ایران, Vol 22, Iss 1, Pp 133-142 (2014)
Tree felling could optimally result in a low height of the left-over stump, which might positively cause an increment in the harvested amount of wood and in turn augment the associated income. To study this issue, a number of 254 felled trees were ra
Externí odkaz:
https://doaj.org/article/ebb9026b035e4246ad55ee3e92fa66c1
Autor:
Farzam Tavankar, Mehrdad Nikooy
Publikováno v:
تحقیقات جنگل و صنوبر ایران, Vol 25, Iss 1, Pp 69-58 (2017)
Protection of forest soil is one of key factors in having sustainable productive forests. In this research extent and intensity of soil disturbance due to extraction of logs of felled trees (20.5 m3/ha) were studied in Nav-e Asalem forest in Gilan pr
Externí odkaz:
https://doaj.org/article/405c17cb0a6746ebb0c1e10a33ba1df0
Publikováno v:
تحقیقات جنگل و صنوبر ایران, Vol 24, Iss 1, Pp 76-65 (2016)
The study presents models of error estimation in trees’ directional felling according to several effective factors using the subtractive clustering in the Adaptive Neuro-Fuzzy Inference System. A total number of 95 trees in the compartment 207 of 2
Externí odkaz:
https://doaj.org/article/09133a2a071940f4bb42aeeb559d4ddf
Publikováno v:
تحقیقات جنگل و صنوبر ایران, Vol 24, Iss 1, Pp 8-1 (2016)
Each skid trail construction affects the trees located on the road margins in various extents. The present study was conducted with the aim to assess the changes in annual ring widths of Beech and Alder trees compared to the control trees inside the
Externí odkaz:
https://doaj.org/article/a13d54d808194c43ba888864ff790de2
Publikováno v:
تحقیقات جنگل و صنوبر ایران, Vol 18, Iss 3, Pp 425-417 (2010)
Felling as the initiation of harvesting chain-work is the first step for preparing trees to market consumption which has severe effect on the subsequent work stages. The aim of this research is to assess the productivity of manual felling and costs o
Externí odkaz:
https://doaj.org/article/514c6149bb7941b386e366af50856181
Publikováno v:
تحقیقات جنگل و صنوبر ایران, Vol 16, Iss 4, Pp 659-649 (2008)
In this study, wood extract production and costs were assessed in the planned and unplanned (conventional) logging system. The research was carried out in compartments No. 23 and 25 of second district of Nave-Asalem forest. Work study technique based
Externí odkaz:
https://doaj.org/article/ba8a4b9a1433473793456399d1bf09ea