搜索结果: 1-12 共查到“林业基础学科 methods”相关记录12条 . 查询时间(0.093 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...
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...
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...
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...
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...
Possible methods of Norway spruce (Picea abies[L.] Karst.) stem shape description
Norway spruce (Picea abies [L.] Karst.) stem shape Bookstein coordinates stem shape diameters Procrustes tangent coordinates principal components analysis
2015/2/6
The paper shows a possibility of using Bookstein coordinates for stem shape studies. Bookstein coordinates are simplified to stem shape diameters, for which tests of multidimensional normality, varian...
Methods for the Assessment of Humic Substances Quality in Forest Soils
forest soils humus quality DRIFT spectroscopy humic acids fulvic acids humin
2015/1/28
This paper is focused on soil organic matter quality assessment in acid forest soils. Soil samples were collected in the Jizera Mountains region. Vegetation cover of sampling sites was formed by spruc...
Effect of Spatial Scale on Modeling and Predicting Mean Cavity Tree Density: A Comparison of Modeling Methods
CART, Logistic Regression Neural Network Oak Forest Prediction Accuracy
2013/3/4
Cavity trees are integral components of healthy forest ecosystems and provide habitat and shelter for a wide variety of wildlife species. Thus, monitoring and predicting cavity tree abundance is an im...
New methods for assessing Marbled Murrelet nesting habitat: Air photo interpretation and low-level aerial surveys
air photo interpretation Brachyramphus marmoratus habitat mapping habitat suitability
2010/8/31
This extension note summarizes the application of two new methods that were developed to assess the quality of forest habit that Marbled Murrelets (Brachyramphus marmoratus) use for nesting in British...
Analysis of Prediction Methods for Budburst Days Based on the Phenological Observation in 29 Broad-leaved Tree Species for 10 Years
prediction error prediction methods for budburst days the number of days transformed to standard temperature thermal time
2009/8/27
Budburst phenology was observed in 29 broad-leaved tree species for 10 years at the Kamiatago Field of Shizuoka University, Japan, located in the warm temperate zone. Prediction methods for budburst d...