By Edward F. Gilman
Good written and simple to appreciate, An ILLUSTRATED consultant TO PRUNING, 3rd version is a must have for someone drawn to the pruning and upkeep of timber. packed with up-to-date illustrations, pictures, and examples, this thoroughly up-to-date advisor is designed to assist readers comprehend and enforce definitely the right pruning practices which are important to constructing sustainable constitution within the first 25 years of a tree's existence. assurance encompasses a number of information regarding the demanding situations linked to pruning resembling sickness prevention, root pruning, mature tree pruning, and recovery following storms. With its easy tables, lists, and methods, this ebook is an attractive source for horticulture, panorama and tree institutions and industries and is a common addition for botanic backyard and arboreta bookstores.
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Additional info for An illustrated guide to pruning
The branch protection zone does not form in the darkened tissue in the center portion of branches. This tissue has been referred to as heartwood and in many trees begins to form in branches by the time they are five to about fifteen years old. The negative implications for the tree should be clear when removing large diameter branches with heartwood, so consider all other options first. Because discoloration and decay could spread easily into the trunk through heartwood when a large branch is removed, give careful consideration before proceeding.
44 b CHAPTER 4 Cross section of a trunk in the year of trunk injury Wall 4 Pith Ray Discolored wood Wall 3 Wall 2 Wound Cork cambium Xylem Phloem Cambium Current growth ring FIGURE 4-3a. Woody tissues are arranged in the following order from outside to inside the tree: bark, cork cambium (produces bark), phloem, cambium (produces xylem and phloem), and current growth ring of the xylem. When a tree is injured, it can respond by plugging the xylem ends (plugging makes up wall 1—not shown). Injured trees also react to form wall 4.
This makes the tree more susceptible to attack by agents such as insects and disease. Improper pruning can also make it tough for trees to recover from floods, droughts, or other stresses. 46 b CHAPTER 4 Cross section of a trunk ten years after injury Radial crack Ring crack Closure crack Trapped starch Wall 4 Growth since injury Discolored wood Wall 4 Phloem Cambium FIGURE 4-3c. Wall 4 extends further around the trunk compared to two years after injury. It is now more than half way around the trunk ten years after injury.
An illustrated guide to pruning by Edward F. Gilman