selection cutting using skidding system often causes physical damage to residual stand through felling and skidding resulting decline of bole quality and tree value. this research evaluated logging damage using skidding system on residual trees and stand regeneration in uneven aged hardwood forest of asalem, were selection cutting was practiced. in this regard, systematic sampling method was us...

Abstract Aboveground biomass is usually estimated using an allometric method. Diameter at breast height (DBH) one of the important variables that used in estimating aboveground biomass. There a relationship between values with size trees, DBH, tree height, crown diameter and greenness trees. In remote sensing, biophysical parameters can be derived from digital image processing trees assessed no...

Tanoak (Notholithocarpus densiflorus syn. Lithocarpus densiflorus) is one of the most widespread and abundant associates of coast redwood (Sequoia sempervirens), but little is known about the structural relationships between these two species. Knowledge of such relationships is essential for a thorough understanding of the impacts of sudden oak death (caused by the exotic pathogen Phytophthora ...

fire, as a natural ecological disturbance factor in forest, this study located in the marivan region, northern zagros forest, and western iranian state of kurdistan. in each burned and unburned area 30 circle sample plot (1000 m2) were collected by randomized–systematic method in the 100×200 m net (in total 60 plots). in every sample plot the kind of species, number of tree, the height of coppi...

Regression models to predict diameter at breast height (DBH) as a function of tree height and maximum crown radius were developed for Caribbean forests based on data collected by the U.S. Forest Service in the Commonwealth of Puerto Rico and Territory of the U.S. Virgin Islands. The model predicting DBH from tree height fit reasonably well (R2 = 0.7110), with strongest in subtropical moist and ...

Diameter at breast height (DBH) is the main metric for standing tree growth measurements. Developing fast and efficient measurement devices measuring DBH of great values in forest resource surveys. In this paper, we propose a new diameter instrument developed using self-reset displacement sensor, which equipped with Personal Computer (PC) terminal to enable measurement, transmission, storage, a...