Stand Age

Stand Age

 

one of the basic valuational criteria which characterize a stand. Stands are divided into classes according to their age. For coniferous and hardleaved deciduous stands grown from seeds, 20-year age classes have been determined; for undergrowth and softleaved deciduous stands grown from seeds, ten-year age classes; and for species of brushwood, five-year age classes. A stand in which the ages of the trees vary within the limits of a single class is considered to be of the same age, whereas if the ages fall within several classes, the stand is considered to be of different ages. The ages of trees are determined by the number of annual layers (rings), as seen on the stumps of sample trees which have been cut down or on a cylinder of wood which is removed from the trunk of a growing tree by a special borer. Another method of determining the age of trees is by external criteria, such as the color of the needles, the form of the crown, and the color and structure of the bark.

References in periodicals archive ?
The objective of this study was to determine the effect of (i) pasture type, (ii) leucaena stand age (0-40 years) and (iii) profile depth (0-1.0 m) on the amount (t [ha.sup.-1]) and origin ([C.sub.3]- or [C.sub.4]-C) of fLF-C using stable [sup.13]C isotopes.
Free light fraction carbon and nitrogen, a physically uncomplexed soil organic matter distribution within subtropical grass and leucaena-grass pastures
FIGURE 1 Age distribution of forest stands in South Korea (Korea Forest Service 2016b) Stand age (year) Forest area (1 000 ha) 1 ~ 10 4% 11 ~ 20 3% 21 ~ 30 22% 31 ~ 40 46% 41 ~ 50 18% 51 < 7% Note: Table made from bar graph.
Maintaining long-rotation forestry: a new challenge for sustained yield of timber resources in South Korea/Maintenance d'une foresterie a rotation longue: un nouveau defi faisant face a l'effort d'obtenir un rendement soutenu de ressources forestieres en Coree du sud/Mantenimiento de la silvicultura de turno largo: un nuevo reto para el rendimiento sostenido de los recursos maderables en Corea del Sur
In these ecosystems differences in stand age are associated with variation in species-specific regeneration rates but little change in the suite of species present.
10:15 AM - Noon Podium Session 4 Ecology and Environmental Science Mylander Room--BTSU 207
Generally, forest stand development has a strong relationship with carbon pools of forest ecosystem because tree growth rate of forest ecosystem mostly varies with stand age [8, 9].
Patterns of Biomass and Carbon Allocation across Chronosequence of Chir Pine (Pinus roxburghii) Forest in Pakistan: Inventory-Based Estimate
Invasive shrub distribution varies with distance to roads and stand age in eastern deciduous forests in Indiana, USA.
ESTIMATING INVADING CALLERY PEAR (PYRUS CALLERYAN A) AGE AND FLOWERING PROBABILITY IN AN INDIANA MANAGED PRAIRIE
(2006) reported that microhabitat and stand age of sand have effects on soil seed viability and seedling development.
Composition of soil seed bank over Cholistan desert microhabitats at Dingarh Fort Area, Pakistan
Thirdly, it is difficult to estimate stand age in forest inventories of large scale.
Preliminary individual tree growth model, site index model <> model for aleppo pine (Pinus haiepensis Mill.) in Chalkidiki (Northern Greece)/Modelo individual preliminar de crescimento de arvore, modelo de indice de local e modelo de "mortalidade" para pinheiro-de-aleppo (Pinus halepensis Mill.) em Chalkidiki (Grecia Do Norte)
Two different stand age groups were formed (5 to 7 years and 8 to 12 years), each with approximately the same number of sample plots, based on statistical tests that showed differences in key attributes, including density, diameter, and volume.
Economic feasibility of utilizing precommercially thinned southern pine as a woody biomass energy source
Enright NJ and Goldblum D (1998) Demography of a nonsprouting and resprouting Hakea species (Proteaceae) in fire-prone Eucalyptus woodlands of south-eastern Australia in relation to stand age, drought and disease.
Premature opening and dimorphism in Hakea decurrens (Proteaceae) follicles: a bet-hedging regeneration strategy?
[26] focused on the ant population ratio in natural forests and oil palm plantations, but she had not yet discussed how changes in ant communities in line with the development of peat land with different palm stand age. While Bruhl and Eltz, [3] studied the loss of forest ant species on oil palm plantations in Sabah, Malaysia.
Communities of ants (Hymenoptera: Formicidae) in peatland planted with oil palm stands of different age strata
The trajectory of a let-grow forest -- one that is not harvested but left to grow -- is based on the observed rate of live tree carbon by stand age. It illustrates a slowing growth rate of net aboveground carbon sequestration as the forest ages.
Carbon calculator tracks the climate benefits of managed private forests
Douglas-fir forests in the Oregon and Washington Cascades: Relation of the herpetofauna to stand age and moisture.
Abundance of Western Red-backed Salamanders (Plethodon vehiculum) in the Washington Coast Range after headwater stream-buffer manipulation
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