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- Tree structure and growth
- 13 Most Common North American Pine Species
- The Fastest Fast Growing Trees
- The Growth Rate of a Douglas Fir
- Pine Tree Diameter Vs. Age
Tree structure and growth
As a pine tree grows, the trunk and branches get thicker. Each year adds another layer of wood. Other methods such as calculating the diameter of the tree or counting the whorls of a pine tree are useful tools for estimating age. Measure the circumference of the tree trunk at about 54 inches above the ground or chest height. Using the formula of diameter equals the circumference divided by pi, calculate the diameter of the tree. A pine tree with a chest-high circumference of 70 inches has a diameter of about The International Society of Arboriculture, the organization responsible for creating this formula, assigned a growth factor number to various species of trees according to their average growth rate. The white pine tree has a growth factor of 5. A white pine tree with a chest-high circumference of 70 inches is about years old. Also, this formula is more accurate with forest-grown trees than with trees grown in the urban landscape because the growth factor is based on the growth rate of trees in the wild. Irrigation and applications of fertilizers by homeowners and park maintenance workers prevent maintained trees from experiencing true growth based strictly on natural condition. The age of a pine tree can also be determined by counting whorls. As a pine tree grows each year, new branches form a circle, or whorl, around the trunk. The number of whorls is an approximation of the age of the tree. However, being able to see and count the whorls on very old trees may be difficult and impractical. Elizabeth McNelis has been writing gardening, cooking, parenting and homeschooling articles from her St. Petersburg urban homestead since About the Author. Photo Credits. Copyright Leaf Group Ltd.13 Most Common North American Pine Species
Mark Bingaman has entertained and informed listeners as a radio personality and director of programming at stations across the U. A recognized expert in the integration of broadcast media with new media, he served as associate editor and director of Internet development for two industry trade publications, "Radio Ink" and "Streaming Magazine. But it also makes a manageable landscape specimen. A part of American lore, the tree is widely used in the lumber industry and as an important Christmas symbol. The Douglas fir Pseudotsuga menisci is an ornamental tree that is also widely utilized as a Christmas tree. It claims a medium rate of growth; a medium growth rate, according to the Arbor Day Foundation, signifies a tree that grows between 13 and 24 inches in height annually. An evergreen, this specimen possesses a straight trunk and grows into a pyramidal shape. It claims needles that are a mixture of blue and green or, occasionally, a combination of yellow and green. The Douglas fir tops out at a height of between 40 and 70 feet with a spread of between 12 and 20 feet. The fruit of the tree is a light, brown cone that grows to a length of between 3 and 4 inches, with blooming occurring in April or May. The tree reaches it prime growth potential in U. Department of Agriculture Plant Hardiness Zones 4 through 6, an area that includes the cooler sections of the United States. The Douglas fir appreciates full sunshine with a mixture of partial shade and grows best in deep, moist, well-drained soils with a pH between 5. It will not thrive or reach its full growth potential in poorly drained or highly compacted soils. The U. Forest Service indicates that although the tree is host to hundreds of fungi, few of those cause any considerable damage to the Douglas fir. Considered one of the most important timber trees in the world, two chief varieties of Douglas fir exist; one of them is Coast Douglas fir, which is native to British Columbia and stretches along the Pacific coast to central California and western Nevada. The coastal variety is faster growing and can reach more than feet tall. Pin Share Tweet Share Email. Growth Rate. Arbor Day Foundation: Douglasfir U. Hermann, et al. Show Comments.
The Fastest Fast Growing Trees
There are about species of pines worldwide, although different authorities accept between and species. Pines are evergreen and resinous trees rarely shrubs. Pines are among the most plentiful and commercially important of tree species, valued for their timber and wood pulp throughout the world. In temperate and semi-tropical regions, pines are fast-growing softwoods that will grow in relatively dense stands, their acidic decaying needles inhibiting the sprouting of competing hardwoods. They are often grown in plantation managed forests for both lumber and paper. There are actually 49 species of native pines in North America. Pines are especially widespread and predominant in the Southeast and on drier sites in the Western mountains. Here are the most common and valuable pines that are native to the United States and Canada. Leaves: All of these common pines have needles in bundles of between 2 and 5 needles and wrapped sheathed together with paper-thin scales that attach to the twig. The needles in these bundles become the tree's "leaf" that persists for two years before dropping as the tree continues to grow new needles every year. Even as the needles are dropping bi-annually, the pine maintains its evergreen appearance. Cones: Pines have two types of cones - one to produce pollen and one to develop and drop seeds. Pine cones usually mature in the second year, dropping a winged seed from between each cone scale. Depending on the species of pine, empty cones may drop off immediately after seed fall or hang on for several years or many years. Some pines have "fire cones" that only open after the heat from a wildland or prescribed fire releases the seed. Bark and Limbs: A pine species with smooth bark generally grows in an environment where a fire is limited. Pine species that have adapted to a fire ecosystem will have scaly and furrowed bark. A conifer, when seen with tufted needles on stout limbs is confirmation that the tree is in the genus Pinus. Gernandt, David. Gernandt, Jorge A. Share Flipboard Email. Steve Nix. Forestry Expert. Steve Nix is a natural resources consultant and a former forest resources analyst for the state of Alabama. He is a member of the Society of American Foresters.
The Growth Rate of a Douglas Fir
Pine trees are grown for beautifying the landscape, creating privacy screens, and also, for collecting timber. This Gardenerdy article deals with how fast pine trees grow, and provides some helpful information on quick-growing pine varieties that are used for landscaping projects. The slow-growing bristlecone pine Pinus aristata are the oldest living trees, with one of them present in the Great Basin National Park, in Nevada, which is about 4, years old. They grow in USDA hardiness zones 4 through 8. Trees are generally slow growers, and take a few decades to attain their maximum size. However, some cultivars develop at an exceptionally slow rate. For those of you who have recently shifted to a new place and plan to starting landscaping right from scratch, planting fast-growing trees is a practical solution. One such tree that grows fast and makes an attractive specimen in the landscape is none other than the pine. They are the most common coniferous trees grown all over the world, having about species. They look amazingly attractive during winters, and are mostly used as Christmas trees, especially the Scotch pine trees, during the festive season. Let us find out the growth rate of some species of pine trees. Different types of pines are used for different purposes in landscaping. This feature makes them perfect for creating privacy screens, protecting properties, and windbreak barriers against winds. They also look adorable with their needle-shaped foliage. But one thing that concerns landscapers is the rate at which they grow. Well, the answer differs from species to species and the growth conditions that are provided to them. On an average, the yearly growth rate of pine trees is less than a foot to more than two feet. Thus, according to the growth rate per year, they are broadly grouped into three types, viz. Examples of slow-growing pine trees are Virginia pine and longleaf pine. They grow to a maximum of one foot a year. The medium-fast growing pine trees grow about feet per year, and examples are red pine and Austrian pines. Lastly, the fast-growing pines grow up to two feet and more annually. Talk about pine trees that grow rapidly, and the Australian pine is commonly included in the list. Despite the name, this straight-growing, tall tree is not a true pine species. But, it belongs to the Casuarina genus, and is not related to evergreen conifers. The needle-shaped structure that resembles pine foliage is composed of jointed branchlets, while true leaves are reduced in the form of scales. If you want to plant rapid-growing pines, then check out the following varieties below:. This fast-growing, drought-tolerant pine is grown for its evergreen foliage. It adapts well in full sun and alkaline soil having pH 7. At maturity, it attains a maximum height of 80 feet and spreads to approximately 30 feet. When planted in a row, this pine variety is excellent for marking garden borders. But, make sure that you leave a spacing of 15 feet or slightly more between two Afghan pine trees. The Aleppo pine grows to a maximum height of 40 feet with an almost equal spread.
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