10 Neat things about trees
1. Can trees communicate with each other?
Some trees (elms come to mind) appear to exchange information and even nutrition through the network of mycorrhizae that populate their root systems.
Mycorrhizae are fungi that have formed a symbiotic relationship with tree roots in order to obtain carbohydrates from the tree in exchange for water and mineral nutrients.
Others (acacias) appear to be able to send either a chemical or an electrical message to fellows in their vicinity when they are under threat from a leaf-nibbling animal.
And trees such as the black walnut certainly send chemical signals with a toxic substance called juglone that wards off competition from certain other plants.
2. Sewer seeking trees: fact or fiction?
The idea that tree roots maliciously seek out your sewage system and cause cracks is only an urban myth.
What some tree roots will do is grow more vigorously in areas where they encounter moisture and nutrients (wouldn’t you?).
If sewer pipes are old or have perforations or openings, then tree roots will grow in that direction.
A few cups of copper sulfate flushed through your toilet drains will kill hair roots and decompose larger roots without damaging the tree.
3. Deep roots.
Trees with deep roots are the least likely to cozy up to your pipes and weeping tiles.
These include bur oak, black walnut, common hackberry and some types of hickory.
Trees that like dry conditions and so will avoid moisture-laden drains include beech, Black cherry, Black locust, European and Paper birch, Norway maple, many pines and spruces and Staghorn locust.
4. Fodder for feeder roots.
Most fine feeder tree roots exist within the top eight to 12 inches of soil.
Use a method called vertical mulching to effectively fertilize a large tree.
Measure out about three feet from the trunk.
With an auger, drill two-inch diameter holes eight to 12 inches deep every 18 to 24 inches or so.
Extend the pattern from three to 10 feet beyond the drip line of the tree.
Alternately, dig a trench around the tree to the same depth. Back-fill with peat moss, permeable materials and fertilizer.
Then distribute the amount of fertilizer needed evenly between the holes.
Fill the holes with coarse peat moss or fine gravel and water for a couple of hours.
5. To prune or not to prune roots.
A little root pruning will not harm your tree and will even stimulate new root growth.
However, be careful not prune more than 30 per cent and don’t cut the anchor roots that extend on either side to give the tree stability.
Sometimes a root pruning will shock a reluctant tree or shrub into flowering.
6. The kindest cut.
When to prune how to prune, should I prune? These are all questions facing the new tree owner.
The answer is simple. Healthy trees don’t need pruning unless they have damaged or diseased limbs.
If you do have to remove a limb, cut it back to the swelling (the collar) that occurs just before the limb meets the trunk, leaving the collar in place to callus over and heal the wound.
You do not need to paint the cut with anything.
The second reason for pruning is cosmetic: sometimes people want to shape their trees for a variety of reasons.
Finally, fruit trees are pruned in order to allow light to reach the centre branches and encourage the production of more fruit.
7. Plant a tree, reap a reward.
A healthy tree can increase the value of your home by up to 27 per cent.
A damaged tree, however, can decrease property value.
Well-chosen and well-positioned trees can reduce heating costs by 15 percent in winter and cooling costs by as much as 50 per cent in summer.
8. Plant a tree for tomorrow.
Lilacs, elms, oaks and beeches can all live 200 to 300 years or more.
Common firs and spruces can live as long as 800 years, and sequoia are well known both for their bulk and their great age.
The champion long livers are the pines, one of which, Pinus longaeva, has been clocked at 4,900 years.
Long-lived trees generally grow slowly – some as slowly as one inch per century!
9. Plant a tree to clean up the environment.
Trees can clean up groundwater contamination through a process called phytoremediation.
They can do this by changing the chemical composition of organic contaminants such as PCBs through interaction with bacteria at the root level.
Trees can change the chemistry of heavy metals such as mercury which is then expired into the air through the leaves.
Finally, trees can take up contaminants and store them in their wood and in leaves.
The recovery of heavy metals stored in this way is called phyto-extraction.
1o. The lungs of the world.
Trees produce oxygen in exchange for carbon dioxide.
A large tree puts out enough oxygen to sustain four people every day.
It takes about 100 trees to capture and store one tonne (2,204 Ibs.) of carbon dioxide in a year.
Trees are most efficient at sequestering carbon in their younger years.
The type of tree planted will also have an effect on sequestration.
Fast growing trees such as poplars are very good at this task.
– The Ultimate Guide to Cold Climate Gardening by Bernie Whetter, owner of The Green Spot
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How to sit fit at your keyboard and monitor.
Here are some tips on positioning courtesy of Allseating:
The key to keying
Using a keyboard tray to help prevent wrist pain and repetitive strain injuries.
While keying, keep your arms at right angles (aim for 90 degrees) and close to your body.
Your wrists should be straight so you don’t see any wrinkles.
Keep your mouse close to the keyboard – preferably on a mousing platform – to minimize reaching.
Monitoring your posture
Your monitor height keeps your back straight and your head up, which is crucial to avoiding neck strain and injuries.
Align your monitor so it’s centered between your shoulder blades and positioned about an arm’s length away from your face.
The height should be so that the top line of text you’re reviewing is at or just below eye level.
Fluid Task Chair