An accurate tree diameter (DBH) measurement is a significant component of forest inventory. This study assessed the reliability remote dendrometers to measure DBH. We compared direct caliper measurements (reference measurements) collected from laser and smartphone at 0.5 m, 1 1.5 m distances each within three types (pine, oak, poplar forests). In general, all underestimated mean measurements, r...

The effects of initial spacing layout on some allometric characteristics of 12-year-old Quercus castaneifolia trees grown in Central Mazandaran, north of Iran were examined. Trees were planted in 5 different layouts (1?1, 1.5?1.5, 2?2.5, 2?3 and 4?4 m). Tree height, diameter at breast height, natural pruning height and the survival of trees were recorded in each sample plot. Tree basal area and...

the effects of initial spacing layout on some allometric characteristics of 12-year-old quercus castaneifolia trees grown in central mazandaran, north of iran were examined. trees were planted in 5 different layouts (1?1, 1.5?1.5, 2?2.5, 2?3 and 4?4 m). tree height, diameter at breast height, natural pruning height and the survival of trees were recorded in each sample plot. tree basal area and...

1 The rapid growth rates of light-demanding tree species have been attributed in part to their low-density, low-cost stems. We evaluated the influence of light and biomass support costs on growth rates of trees 8–25 cm in diameter at breast height (d.b.h.) among 21 species differing in wood density in two aseasonal rain forests. 2 Measurements of crown width, tree height, d.b.h. and wood densit...

Silver fir is one of the most threatened conifer species in Croatia, especially at western edge its spread Croatian Dinarides, where decline trees has resulted significant ecological and economic issues. The aim this study was to determine, over an 18-year monitoring period, relationships silver crown defoliation with climatic factors structural attributes. We further analyzed tree retention ti...

The paper brings forward ways to solve the problem of estimating trunk diameter using data airborne laser scanning (LIDAR) relevant for forest inventory. At first stage studying, it was defined regularities tree height and relations various species, as well coefficients coupling equations significance “height-diameter” based on field data. second stage, calculated crown parameters (diameter vol...

in order to study morphological variation within seeds and seedlings of a pistachio population of ‘badami-riz-e-zarand’, 20 quantitative traits were measured in sixty-seven nut and seedlings originated from them. results showed that there was positive and significant correlation between traits of nuts (seeds) and kernels, not between seedling height and crown diameter. according to measured par...

Height–diameter relationships based on stand characteristics (trees/ha, basal area, and dominant stand height) were investigated for balsam fir, balsam poplar, black spruce, jack pine, red pine, trembling aspen, white birch, and white spruce using data from permanent growth study plots in northern Ontario, Canada. Approximately half the data were used to estimate model parameters with the rest ...