搜索结果: 1-15 共查到“林学 methods”相关记录31条 . 查询时间(0.156 秒)
Using Direct and Indirect Methods to Assess Changes in Riparian Habitats
riparian forest environmental changes soil moisture Ellenberg’s indicator values field measurements
2023/12/21
Hydrological regime disturbances in riparian ecosystems affect the interactions between soil properties and vegetation. The proper assessment of changes occurring in river valley forests is a basis fo...
Assessment of Different Measurement Methods/Techniques in Predicting Modulus of Elasticity of Plantation Eucalyptus nitens Timber for Structural Purposes
Eucalyptus nitens structural applications hardwood plantation structural grading modulus of elasticity
2023/12/6
The mechanical properties of plantation Eucalyptus Nitens timber are currently assessed by applying visual stress grading (VSG) designed for the sawn timber from the mature plantation and do not repre...
Improving Estimates and Change Detection of Forest Above-Ground Biomass Using Statistical Methods
above-ground biomass remote sensing statistics modelling spatial modelling machine learning
2023/11/29
Forests store approximately as much carbon as is in the atmosphere, with potential to take in or release carbon rapidly based on growth, climate change and human disturbance. Above-ground biomass (AGB...
Error Analysis on the Five Stand Biomass Growth Estimation Methods for a Sub-Alpine Natural Pine Forest in Yunnan, Southwestern China
above-ground biomass biomass growth error analysis Pinus densata forests
2023/11/22
Forest biomass measurement or estimation is critical for forest monitoring at the stand scale, but errors among different estimations in stand investigation are unclear. Thus, the Pinus densata natura...
Spectrometric Classification of Bamboo Shoot Species by Comparison of Different Machine Learning Methods
Spectrometric Classification Bamboo Shoot Machine Learning
2023/6/5
The nutrition and quality of bamboo shoots from different species have a large variation, and traditional methods used for the classification of different bamboo shoot species are expensive and time-c...
Detection of the effects of management and physical factors on forest soil carbon stock variability in semiarid conditions using parametric and nonparametric methods
soil organic carbon CART modelling, neural networks
2015/11/26
Forest soils in western parts of Iran are being degraded by inappropriate management. The soil organic carbon (SOC) stock was dominantly affected by this type of degradation. On the other hand, SOC is...
Comparison of different forest regeneration methods after windthrow
target tree species pioneer tree species
2015/5/5
The prosperity of various forest regeneration methods was evaluated on the prepared windthrow area
established in 2010 in a previously allochthonous coniferous stand growing in mid-elevations of the...
An infl uence of diff erent thinning methods on qualitative wood production of European beech (Fagus sylvatica L.) on two eutrophic sites in the Western Carpathians
European beech tending qualitative production crop trees
2015/5/5
The issues related to appropriate management methods of beech stands have been considered as a
crucial topic from the past up to now. Although the positive effect of tending on wood quality in beech...
Development of target (crop) trees in beech (Fagus sylvatica L.) stand with delayed initial tending and managed by different thinning methods
European beech target (crop) trees different tending
2015/4/24
We evaluated the research on silviculture-production in the last 45 years in a 105-year-old beech stand, not tended up to its stand age of 60 years. Four alternatives (tending regime) were studied for...
Modelling of tree diameter growth using growth functions parameterised by least squares and Bayesian methods
growth function nonlinear least squares Bayes diameter estimation
2015/4/14
The purpose of this paper is to present a new growth and yield function (denoted as KM-function), which was empirically derived from the cumulative density function of the Kumaraswamy probability dist...
Costs of basic methods of forest landmaintenance in protective zones of high-voltage power lines in the Czech Republic
Czech Republic forest lands high-voltage power lines maintenance costs
2015/3/20
The paper describes the basic potential methods and their costs of maintenance of forest lands in protective zones under high-voltage power lines (HVPL) 400 kV and 220 kV. In the present situation and...
Timber harvesting in the ukrainian carpathians: Ecological problems and methods to solve them
crawler and wheeled skidders damage to ground surface rut formation undergrowth damage
2015/3/19
The paper contains results of comparative investigations of crawler and wheeled skidders regarding their effect on soil surface, undergrowth and rut formation during mountain timber harvesting. It was...
Comparison of three methods to determine optimal road spacing for forwarder-type logging operations
forwarding production cost travelling model
2015/3/16
Optimum road spacing (ORS) of forwarding operation in Styria in Southern Austria is studied in this paper. In a harvesting operation it is important to compute the ORS to minimize the total cost of ha...
Evaluation of three methods for estimating the Weibull distribution parameters of Chinese pine (Pinus tabulaeformis )
Weibull distribution diameter distribution parameter estimation
2015/3/12
Weibull distribution was used to fit tree diameter data collected from 86 sample plots located in Chinese pine stand in Beijing. To estimate the Weibull distribution parameters, three methods [namely ...
The authors elaborated a new complex methodical approach to the evaluation of necrotic disease of beeches. They used two evaluation scales: a scale for the evaluation of stems and a scale for the eval...