نتایج جستجو برای: forest plot was employed results

تعداد نتایج: 5609628  

Journal: :Remote Sensing 2016
Enping Yan Hui Lin Guangxing Wang Hua Sun

Combining sample plot and image data has been widely used to map forest carbon density at local, regional, national and global scales. When mapping is conducted using multiple spatial resolution images at different scales, field observations have to be collected at the corresponding resolutions to match image values in pixel sizes. Given a study area, however, to save time and cost, field obser...

2007
Nikola Sprigg Mark R Willmot Laura J Gray Alan Sunderland Valerie Pomeroy Marion Walker Philip M W Bath MD FRCP

List of Tables and Figures: Table 1 Baseline characteristics of patients Table 2 Outcome by treatment group Table 3 Haemodynamic measures by treatment group Table 4 Number of patients suffering serious adverse events (SAE) by treatment group Figure 1 Trial Design Figure 2a Updated forest plot (meta-analysis) of effect of amphetamine on motor improvement Figure 2b Updated forest plot (meta-analy...

A. Bonyad A. Mobasher Amini R. Naghdi,

Forest roads are the most important elements of forestry projects, the management, supervision, care, and only access way to the forest for mechanized harvesting and using other services of forests. The aim of this study was to compare the current annual increment of basal area in different distances from the road in northern forests of Iran. For this purpose, 50 plots were established in 5 dis...

2008
Andrew T. Hudak Nicholas L. Crookston Jeffrey S. Evans David E. Hall Michael J. Falkowski

Meaningful relationships between forest structure attributes measured in representative field plots on the ground and remotely sensed data measured comprehensively across the same forested landscape facilitate the production of maps of forest attributes such as basal area (BA) and tree density (TD). Because imputation methods can efficiently predict multiple response variables simultaneously, t...

Journal: :Environmental Modelling and Software 2016
Wenchi Jin Hong S. He Frank R. Thompson

Process-based forest ecosystem models vary from simple physiological, complex physiological, to hybrid empirical-physiological models. Previous studies indicate that complex models provide the best prediction at plot scale with a temporal extent of less than 10 years, however, it is largely untested as to whether complex models outperform the other two types of models at plot and regional scale...

H. Pourbabaie L. Baktash T.R. Shahraji

The depletion of forest in developing countries due to extended pastures, agricultural land, fuel wood and etc. is a serious concern. Therefore planting trees for reforestation and extended forest area is a essential assignment. Forest plantation with a basic criterion affects to understory plant diversity. This effects may make some species absent or appear. The objective of this study is to a...

2007
J. A. Westfall C. W. Woodall

An efficient and accurate inventory of forest fuels at large scales is critical for assessment of forest fire hazards across landscapes. The Forest Inventory and Analysis (FIA) program of the USDA Forest Service conducts a national inventory of fuels along with blind remeasurement of a portion of inventory plots to monitor and improve data quality. The goal of this study was to evaluate the mea...

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