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leaves and the woody structure between them. The roots' function is to bring raw materials-water and mineral salt dissolved in water-to the tree. The leaves absorb carbon dioxide from the air and use the sun's light energy to combine this gas with the moisture from the roots, thus making the simple sugars that are the basic nutrients of the tree. The trunk, limbs, branches and twigs hold the leaves in position to receive the life-giving sunlight and air; they also act as transportation, carrying raw materials between roots and leaves. The materials absorbed by the roots are pulled up by capillary attraction and the osmotic action induced by evaporation of water from the leaves. Loss of water through the leaves is called transpiration. On a summer day, a single birch tree may transpire 700 to 900 gallons of water. It is this enormous flow of water that causes a continuous flow of sap from the roots to the topmost twigs. In planting or transplanting a tree, and in building on a lot where you wish to preserve the trees, the gardener's chief consideration must be to protect the root structure of the tree. The big roots near the stem anchor the tree to the ground, while the fine root hairs at the ends of the rootlets absorb the water from the soil. The stem or trunk of a tree has three parts: the bark, the wood and the pith. The pith is the central part and around it is the wood. Between wood and bark is the cambium, a thin layer that produces new wood and bark. When the cambium ring is severed, as by a wire cable, the tree is killed, and since the cambium protects against insects and disease, anything driven into it can wound the tree severely. Outside of man himself, trees have countless enemies. There are 200,000 known kinds of insects that attack trees, in addition to diseases such as blight, rust and rot, storms and droughts. Luckily, birds help to keep caterpillars, borers, beetles and other insects in check.
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More Articles:1. Fertilizing Your Lawn Your lawn takes nutrients out of the soil that it is bedded in and uses these nutrients to aid its growth. If your soil lacks these nutrients your lawn will ultimately suffer. So while fertilizing makes your lawn greener it also provides a top of any nutrients that your soil is lacking helping grass to grow. When the nutrients are available, the lawn develops healthier roots which invariably grow deeper allowing the lawn to draw upon water and nutrients in the soil. Furthermore, deep roots reduc… 2. Planting White Pine Seedlings Planting White Pine Trees White pines. Whenever I think of white pines, I remember hunting when I was a kid and standing near trees that were giants. Now every pine tree I plant, I can invision those days in the deep woods and those grand trees and hope someone else will have that same enjoyment. These trees will help you too in establish a desired vision to your landscape. Beyond their size, white pines also fill important ecological niches. They grow across broad ranges of forest and urban c… 3. Decorative Garden Accents Think of your garden like you would a room in your home. After planning the shape, tilling the soil, choosing the right plants the last step is to add those personal touches. And just like indoors this is accomplished with accessories.What type of accessories or accents you add will depend on what you like and what type of garden you’ve designed. For example in a formal type garden you probably would not add whimsical looking birdhouses or a regal looking statue would look out of place in a cott… 4. Selecting the Proper Pump for your Backyard Water Garden Feature Whether you have a preformed or a liner pond, a pond pump is a paramount component of any water feature. Stagnant bodies of water attract mosquito infestations, which are a nuisance, and also undesirable, due to the recent outbreaks of the West Nile virus. Therefore, it is paramount that you utilize a pond pump that circulates your body of water.Pumps are available in both submersible and external (out-of-pond) models. For the smaller pond (up to 1000 gallons of water), a submersible pump is th… |
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