Results 21 to 30 of about 96,592 (176)

SITE QUALITY ESTIMATIONS BASED ON THE GENERALIZED ALGEBRAIC DIFFERENCE APPROACH: A CASE STUDY IN ÇANKIRI FORESTS

open access: yesRevista Árvore, 2018
In this study, it is aimed that the dynamic site index models were developed for Crimean Pine stands in Sarikaya-Cankiri forests located in middle northern Turkey. The data for this study are 153 sample trees obtained from the Crimean Pine stands.
Ugur Akbas, Muammer SENYURT
doaj   +1 more source

Height-diameter model for natural black pine stands in Eğirdir region: Quantile regression approach

open access: yesTurkish Journal of Forestry, 2022
Black pine (Pinus nigra JF Arnold.) is one of the most economically and ecologically important tree species in Turkey. In this context, reliable and accurate information about the current status, growth and yield characteristics of these forests is ...
Onur Alkan, Ramazan Ozçelik
doaj   +1 more source

Effect of Climate Variables on Monthly Growth in Modeling Biological Yield of Araucaria angustifolia and Pinus taeda in the Juvenile Phase

open access: yesInternational Journal of Forestry Research, 2013
The aim of this study was to investigate the effect of climate variables on monthly growth in diameter and height of Araucaria angustifolia (Bert.) O.
Naiara Teodoro Zamin   +3 more
doaj   +1 more source

Reconstructing leaf growth based on non-destructive digitizing and low-parametric shape evolution for plant modelling over a growth cycle

open access: yesSilva Fennica, 2014
A simple and efficient photometric methodology is presented, covering all steps from field data acquisition to binarization and allowing for leaf contour modelling.
Henke, Michael   +3 more
doaj   +1 more source

Parameter estimation of nonlinear growth models in forestry

open access: yesSilva Fennica, 1999
Partial derivatives of the negative exponential, monomolecular, Mitcherlich, Gompertz, logistic, Chapman-Richards, von Bertalanffy, Weibull and the Richard’s nonlinear growth models are presented.
Fekedulegn, Desta   +2 more
doaj   +1 more source

Verification of two- and three-parameter simple height-diameter models for birch in the European part of Russia

open access: yesJournal of Forest Science, 2020
The accuracy of determining the height of trees is essential both in forestry and in scientific research. Height is usually determined using specific models, where it is a function of the diameter at breast height.
Aleksandr Lebedev, Valery Kuzmichev
doaj   +1 more source

EVALUATION OF SITE QUALITY AND MODELLING TREE PRODUCTIVITY BY LIDAR TECHNOLOGY IN SALT-AFFECTED OAK FOREST TERRITORY [PDF]

open access: yesNatural Resources and Sustainable Development, 2019
Forest site quality evaluation is an important part of forest planning and forest management. A forest site is characterized by forest biomass, which is determined by elevation characteristics, soil type and climate.
Riczu Péter, Nagy Attila, Tamás János
doaj   +1 more source

Confirmation of the effectiveness of sub-mm source redshift estimation based on rest-frame radio to FIR photometry [PDF]

open access: yes, 2004
We present a comparison between the published optical, IR and CO spectroscopic redshifts of 15 (sub-)mm galaxies and their photometric redshifts as derived from long-wavelength (radio-mm-FIR) photometric data. The redshift accuracy measured for 12 sub-mm
Aretxaga   +33 more
core   +1 more source

Engelmann spruce site index models: a comparison of model functions and parameterizations.

open access: yesPLoS ONE, 2015
Engelmann spruce (Picea engelmannii Parry ex Engelm.) is a high-elevation species found in western Canada and western USA. As this species becomes increasingly targeted for harvesting, better height growth information is required for good management of ...
Gordon Nigh
doaj   +1 more source

Aging, Maturation and Growth of Sauropodomorph Dinosaurs as Deduced from Growth Curves Using Long Bone Histological Data: An Assessment of Methodological Constraints and Solutions. [PDF]

open access: yesPLoS ONE, 2013
Information on aging, maturation, and growth is important for understanding life histories of organisms. In extinct dinosaurs, such information can be derived from the histological growth record preserved in the mid-shaft cortex of long bones.
Eva Maria Griebeler   +2 more
doaj   +1 more source

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