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Burbank devoted a lot of work to hybridizing two plum species, the apricot plum or Simon plum Prunus simonii and the Japanese plum Prunus salicina. He developed a number of cultivars from the hybrid, [ 2 ] [ 3 ] of which 'Climax' was particularly notable for its importance to the fruit shipping industry of California.
Tree height is the vertical distance between the base of the tree and the highest sprig at the top of the tree. The base of the tree is measured for both height and girth as being the elevation at which the pith of the tree intersects the ground surface beneath, or "where the acorn sprouted."
Prunus salicina (syn. Prunus triflora or Prunus thibetica), commonly called the Japanese plum or Chinese plum, [2] is a small deciduous tree native to China, Taiwan and Southeast Asia. It is an introduced species in Korea, Japan, the United States, and Australia.
This scale gives the tree height in feet directly when measured at a distance of 100 feet (30 m) from the tree. In general, the clinometer is used to measure the angle Θ from the eye to the top of the tree, and then the horizontal distance to the tree at eye level is measured using a tape.
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]
In some cases a girth taken just above the odd growth will be more representative of the actual girth of the tree. In these cases the measurement should be taken there and the height above the base of the tree noted. [citation needed] Some trees have branches at or lower than a height of 4.5 feet (1.37 m).
The commercially important plum trees are medium-sized, usually pruned to 5–6 metres (16–20 ft) height. The tree is of medium hardiness. [ 13 ] Without pruning, the trees can reach 12 metres (39 ft) in height and spread across 10 metres (33 ft).
Prunus simonii, called apricot plum and Simon plum, is a tree in the genus Prunus. It was first described by Elie-Abel Carrière in 1872 and is native to Hebei province, China. [1] The species is not known in a truly wild state. [2] It has been important for breeding commercial plum cultivars from crosses with other species of the genus Prunus.
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