نتایج جستجو برای: Basal area

تعداد نتایج: 674222  

Journal: :journal of agricultural science and technology 2010
h. jalilvand s. gh. jalali m. akbarian m. tabari s. m. hosseini

the impact of climatic variations on basal area growth of basswood (ba) (tilia americana l.), american beech (be) (fagus grandifolia enrh.), bitternut hickory (bh) (caria cordiformis (wang.) k. koch), largetooth aspen (la) (populus grandidentata michx.), red maple (rm) (acer rubrum l.), red oak (ro) (quercus rubra l.), sugar maple (sm) (acer saccharum marsh.), and white ash (wa) (fraxinus a...

B. Dass B. Gupta,

In the present study basal area and Importance Value Index (IVI) attributes of herbage were investigated in chir pine (Pinus roxburghii Sargent) stands of three different ages and also in open grassland in the sub-tropical region of Himachal Pradesh (India) during growing season (June to September). A higher basal area of the herbage was recorded in open grassland as compared to chir pine stand...

Journal: :caspian journal of environmental sciences 2007
b. gupta b. dass

in the present study basal area and importance value index (ivi) attributes of herbage were investigated in chir pine (pinus roxburghii sargent) stands of three different ages and also in open grassland in the sub-tropical region of himachal pradesh (india) during growing season (june to september). a higher basal area of the herbage was recorded in open grassland as compared to chir pine stand...

This research was conducted to investigate spatial variability and estimate tree attributes in a plantation forest in the Caspian region of Iran using geostatistical analysis. Sampling was performed based on a 50m?125m systematic grid in a maple stand (Acer velutinum Boiss) 18 years of age using circular samples of 200m2 area. Totally, 96 sample plots were measured in 63 hectares and 14.25 he...

Journal: :caspian journal of environmental sciences 2010
r. akhavan

this research was conducted to investigate spatial variability and estimate tree attributes in a plantation forest in the caspian region of iran using geostatistical analysis. sampling was performed based on a 50m?125m systematic grid in a maple stand (acer velutinum boiss) 18 years of age using circular samples of 200m2 area. totally, 96 sample plots were measured in 63 hectares and 14.25 hect...

Journal: :Mesopotamia Journal of Agriculture 2007

Journal: :global journal of environmental science and management 0
m. yousefpoor faculty of natural resources, department of forestry, university of guilan, somehsara, guilan, iran t. rostamie shahraji faculty of natural resources, department of forestry, university of guilan, somehsara, guilan, iran a. eslam bonyad faculty of natural resources, department of forestry, university of guilan, somehsara, guilan, iran m. salahi faculty of basic sciences. university of guilan, rasht, iran

in order to evaluate the possible correlation between the tree density and the human population density, the forested area in nav asalem district located in guilan province was selected. the descriptors of tree number and basal area per hectare as well as the stand density index were used to determine the tree density, which was conducted from a 2014 forest inventory including 62 cluster (558 p...

A. Bonyad A. Mobasher Amini R. Naghdi,

Forest roads are the most important elements of forestry projects, the management, supervision, care, and only access way to the forest for mechanized harvesting and using other services of forests. The aim of this study was to compare the current annual increment of basal area in different distances from the road in northern forests of Iran. For this purpose, 50 plots were established in 5 dis...

   The present study aimed to investigate the accuracy and precision estimation of the number, basal area and volume of the standing trees by methods of random and systematic random sampling in the forests of West Guilan. The cost or inventory time was determined using the criteria (E%2 × T). Inventory was carried out by complete sampling (census) in an area of 52 hectares. The study area (sect...

Journal: :علوم دامی ایران 0
هادی فگاری نوبیجاری حمید امانلو مهدی دهقان بنادکی سید حسین حسینی سابقی خسرو قزوینیان

three hundred eighteen young holstein bulls (initial bw = 375 ± 17.5 kg) were randomly allotted to one of six treatments in a completely randomized design for 56 d the treatments of which consisted of 1) the basal diet (control); 2) basal diet plus 30 mg of cu/kg of dm as cuso4; 3) basal diet plus 150 mg of zn/kg of dm as znso4; 4) basal diet plus chlortetracycline (200 mg/animal/d; ctc); 5) ba...

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