in order to determine the best form factor formula for loblolly pine (pinus taeda l.) plantations in talesh (western guilan province-iran), a number of 110 trees were selected based on their distribution in diameter classes, from 12 to 34 cm (in a two- cm diameter interval). first, several quantitative factors including diameter at breast height, diameter at 0.65 m of height, and diameter at st...

In recent years, LIght Detection And Ranging (LiDAR) and especially Terrestrial Laser Scanning (TLS) systems have shown the potential to revolutionise forest structural characterisation by providing unprecedented 3D data. However, manned Airborne Laser Scanning (ALS) requires costly campaigns and produces relatively low point density, while TLS is labour intense and time demanding. Unmanned Aer...

Moso bamboo is characterized by its fast growth and high yield important as a carbon sink species. Therefore, understanding the biomass distribution of components crucial. Based on measured individual data 66 Phyllostachys heterocycla cv. Pubescens plants in Yixing state-owned forest Jiangsu Province, nonlinear simultaneous equations with measurement errors were constructed using error-in-varia...

Currently, little information is available to estimate individual tree attributes for longleaf pine (Pinus palustris Mill.), an important tree species of the southeastern United States. The majority of available models are local, relying on stem diameter outside bark at breast height (dbh, cm) and not including stand-level parameters. We developed a set of individual tree equations to predict t...

We characterized pit and mound (PM) topography resulting from catastrophic wind in the Coweeta Basin, and located 48 PMs a across a variety of forest types. Our measurements included pit length, width, and depth; and mound height, thickness, and width. Species of fallen trees were identified, and DBH (diameter at breast height, 1.37 m) was measured for biomass determination. We identified five ...

The requirements for up-to-date tree data in city parks and forests are increasing, and an important question is how to keep the digital databases current for various applications. Traditional map-updating procedures, such as visual interpretation of digital aerial images or field measurements using tachymeters, are either inaccurate or expensive. Recently, the development of laser-scanning tec...

The tree species density and basal area form structural functional variables of healthy forest ecosystems. Tree are among useful parameters for management natural resources. A study was carried out in Image Forest Reserve (IFR) 2019 to determine area. total 170 plots measuring 20 m x 40 were set along the land cover types at an interval 250 from each other. Trees with a diameter breast height (...

Airborne laser scanning is now widely used for forest inventories. An essential part of inventory is a collection of field reference data including measurements of tree stem diameter at breast height (DBH). Traditionally this is acquired through manual measurements. The recent development of terrestrial laser scanning (TLS) systems in terms of capacity and weight have made these systems attract...

NĚMEC P. 2015. Comparison of modern forest inventory method with the common method for management of tropical rainforest in the Peruvian Amazon. Electronic devices consisting of field computer, laser rangefinder, electronic compass and global positioning system unit were used for data collection in the tropical rainforest of the Peruvian Amazon with the objective of comparing forest inventory m...

ABSTRACT Background: We analyzed if C. lusitanica can be planted in a shelterwood system with P. taeda as the shelter stratum. The study was conducted 13-yr-old stand under canopy Southern Brazil. Samples of these trees were measured terms diameter at breast height (DBH), total height, individual volume, and crown projection area. species´ growing space efficiency (GSE) also analyzed. A 10-mete...