Results 31 to 40 of about 2,699,238 (274)

Investigation on Adaptability and Quantitative Properties of Redwood (Sequoia sempervirens) in north of Iran, Mazandaran province. [PDF]

open access: yesتحقیقات جنگل و صنوبر ایران, 2004
A 19 year old plantation (4×4m) of Redwood on an area of 0.16 ha was selected in Chamestan Experimental Station in Mazandaran Province (North Iran). Results indicate that mean of diameter at breast height ,height and volume per hectar were 31/8cm ,15/15m
Sayyed Reza Mostafanezhad   +1 more
doaj  

Effect of weed elimination treatments on survival, growth and important pest population of poplars in the nurseries of Safrabasteh research station, Guilan province [PDF]

open access: yesتحقیقات جنگل و صنوبر ایران, 2009
Poplar is a one of the fast growing and prolific species that is used for afforestation programs. Advising agro-technical methods with attention to ecological aspects is one of the effective and important factors in integrated management of pests.
Parisa Mahammadpour   +3 more
doaj  

Growth and performance of bare and pot rooted seedlings of Loblolly pine (Pinus taeda L.) after plantation [PDF]

open access: yesتحقیقات جنگل و صنوبر ایران, 2005
Seedling production of P. taeda in plastic bags is economically more expensive than bare-rooted method due to limited space for root development (root rotation) and its negative effects on subsequent seedlings growth and performance at field.
Taymour Rostami Shahraji, Amir Bonyad
doaj  

Investigation on adaptability and performance of species and provenances of Eucalyptus in Markazi province (Saveh) [PDF]

open access: yesتحقیقات جنگل و صنوبر ایران, 2017
The aim of the present study was selection of adaptable species with proper growth and wood production and resistant to cold with the aim of wood production and cultivation in the urban green space and infertile lands of Saveh.
Gholam Reza Goodarzi, Fatemeh Ahmadloo
doaj   +1 more source

Experimental flow boiling study in a 0.52 mm diameter vertical tube using R134a [PDF]

open access: yes, 2008
This article is also available online from the link below.Experimental results for R134a boiling on a vertical stainless steel tube of internal diameter 0.52 mm are presented in this paper.
Shiferaw, J   +3 more
core   +6 more sources

Survival and growth of 10 broadleaved and needleleaved tree species in Fars Province [PDF]

open access: yesتحقیقات جنگل و صنوبر ایران, 2005
Importance of wood as a basic material in industry, along its broad uses and diverse by-products leads us to change our direction from exploitation of natural forests towards artificial forest plantation.
Mohammad Reza Negahdar- Saber   +2 more
doaj  

The Minimum Harmonic Index for Unicyclic Graphs with Given Diameter

open access: yesDiscussiones Mathematicae Graph Theory, 2018
The harmonic index of a graph G is defined as the sum of the weights 2d(u)+d(v)${2 \over {d(u) + d(v)}}$ of all edges uv of G, where d(u) denotes the degree of a vertex u in G.
Zhong Lingping
doaj   +1 more source

The fault-diameter and wide-diameter of twisted hypercubes

open access: yesDiscrete Applied Mathematics, 2018
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Hao Qi 0001, Xuding Zhu
openaire   +2 more sources

Growth and wood production of 10 poplar clones (Populus nigra) at the second harvesting period in Kermanshah [PDF]

open access: yesتحقیقات جنگل و صنوبر ایران, 2009
Kermanshah province is one of the main regions of poplar cultivation in Iran. Therefore, in order to study of growth situation and wood production of poplar clones, this research was carried out in Mehregan station of Agricultural and natural Resources ...
Fathali Noori   +2 more
doaj  

Characterization Of Super-Radial Graphs

open access: yesDiscussiones Mathematicae Graph Theory, 2014
In a graph G, the distance d(u, v) between a pair of vertices u and v is the length of a shortest path joining them. The eccentricity e(u) of a vertex u is the distance to a vertex farthest from u.
Kathiresan K.M.   +2 more
doaj   +1 more source

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