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A line of pollarded willows in Germany Pollarding of plane trees on Mallorca, Spain. As in coppicing, pollarding is to encourage the tree to produce new growth on a regular basis to maintain a supply of new wood for various purposes, particularly for fuel. In some areas, dried leafy branches are stored as winter fodder for stock.
[5] [4] Pruning may also be used to keep a design free of unwanted branches and to reduce canopy size. [23] [30] Pruning is sometimes the only technique used to craft a project. Deciduous trees are mainly pruned in winter, [29]: 137 repeated over pruning of tree may stunt a tree or even kill it. [5]
Quercus alba, the white oak, is one of the preeminent hardwoods of eastern and central North America. It is a long-lived oak, native to eastern and central North America and found from Minnesota, Ontario, Quebec, and southern Maine south as far as northern Florida and eastern Texas. [3] Specimens have been documented to be over 450 years old. [4]
Today, the tree is a thriving, although lopsided, reminder of its once-grand form. Many Texans see the Treaty Oak as a symbol of strength and endurance. In January 2009, the Texas chapter of the International Society of Arboriculture partnered with the Austin Parks and Recreation Department to do maintenance pruning of the Treaty Oak.
Quercus incana is a tree growing to about 10 meters (33 feet) in height, [4] with a maximum height around 15 m (49 ft). [3] The "national champion bluejack" was a specimen from Texas that was 15.5 m (51 ft) tall and 2.1 m (7 ft) in circumference, and had a crown spread of 17 m (56 ft). [3]
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Oak wilt is a devastating exotic disease, killing some trees rapidly in a single season. [7] Oak wilt is an important disease in urban areas where trees are highly valued. . The disease reduces property values because of the loss of trees and is economically costly to the property owner since they or the local government must pay for tree remo
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