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Tree trunks not only vary in shape from top to bottom, but also vary in shape over time. The overall shape of a tree trunk can be defined as a form factor: V = F · A · H, where A = area of the base at a designated height (such as 4.5 feet), H = full height of tree, and F = the form factor. [27]
It is not species-dependent and can be applied to sites of different sizes. The basic Rucker Index is a measure of overall tree height. The Rucker Height Index 10 or RI10 is the numerical average of the height in feet of the tallest individual of each of the ten tallest species on a site. A particular species enters the index only once.
A volume table is a chart to aid in the estimation of standing timber volume. These tables are based on volume equations and use correlations between certain aspects of a tree to estimate the volume to a degree of certainty. The diameter at breast height (DBH) and the merchantable height are used to determine the total volume. Difficulties ...
American Forests, for example, uses a formula to calculate Big Tree Points as part of their Big Tree Program [3] that awards a tree 1 point for each foot of height, 1 point for each inch (2.54 cm) of girth, and ¼ point for each foot of crown spread. The tree whose point total is the highest for that species is crowned as the champion in their ...
The Árbol del Tule in Santa Maria del Tule, Oaxaca, Mexico (Taxodium mucronatum) has a girth of 119.8 feet (36.5 m) and a height of 116.1 feet (35.4 m), with a 144-foot (43.9 m) wide crown as measured by Dr. Robert Van Pelt in 2005. The Tule tree therefore has a diameter of 38.1 feet (11.61 m) as extrapolated from the tape wrap values.
The largest giant sequoias are as tall as a 26-story building, and the width of their bases can exceed that of a city street. They grow at such a rate as to produce roughly 1.1 cubic meters (40 cu ft) of wood each year, approximately equal to the volume of a 50-foot-tall tree one foot in diameter. [7]
At 5 m (16 ft) height, this is the smallest tree in this table. The pollinator is unknown, [153] but would seem to require a very long tongue or beak. The horticultural variety "Supernova" can be up to 24 in (61 cm) in length. B. versicolor is now believed to be extinct in the wild, but fortunately is widely cultivated.
Conversions between units in the metric system are defined by their prefixes (for example, 1 kilogram = 1000 grams, 1 milligram = 0.001 grams) and are thus not listed in this article. Exceptions are made if the unit is commonly known by another name (for example, 1 micron = 10 −6 metre).