You will need

- - the tape;
- calculator.

Instruction

1

Find out the age of the pine's branches. From this tree they form some kind of tiers, also called whorls. This means that every pine grows several branches at the same level. Count the number of these levels and add to them five, as in the first years of the branches are not formed. So you can get the approximate age of the tree.

2

Measure the circumference of the pine tree in inches at a height of about five feet from the ground. Multiply the resulting figure by a factor of 0.7. The resulting figure will be the number of years over which grew a pine tree.

3

As accurately as possible, to the age of a tree can be identified by the annual rings. They can give information not only about how many years old pine growing at that place, but what were the years in terms of weather conditions, favourable or severe. The thicker the ring, the better the weather was for tree growth. For the study of the annual rings is not necessary to cut down a tree. Modern technology, applied dendrology, allow using special tools to sample with saw cut rings. The resulting hole is filled with resin and the tree survives. Such methods have been used, for example, to create a dendrochronological scale of the region.

4

The relative age of the pine can be determined by its height. The taller the tree, so it is in most cases older. In the first years of the pine is growing at 40-50 inches per year, but closer to 30-40 years of growth can be accelerated up to 1 meter per year. So, if you see two standing next to pine trees, you will be able to understand which one is older and by how many years. But this method is not suitable for old trees. Growing up to 40 metres, the tree is not increasing. Thus in his old age may indicate a more active dieback of lower branches, the smaller the splendor of the crown.

# Advice 2 : How to determine the age of a tree

Sometimes it is necessary to determine

**the age****of the tree**. If this plant planted by you or someone from your family, to say how much it was years ago, you will be able quite accurately. It is more difficult to determine the years of "unfamiliar" wood longevity. There are several methods for Dating**the age of**a tree. One of the most accurate ways to determine is a count of annual rings on the frame of the trunk.You will need

- - a saw or a drill of Pressler;
- - solutions for coloring the wood;
- microscope or magnifying glass.

Instruction

1

Make cut, as close as possible to the ground. For more convenience, you will need a pair of circles. For broad-leaved saw cut can be done on the bias so will increase the width of the rings. Good grind place a saw cut. Consider using a magnifying glass or binocular microscope annual rings. If, however, to distinguish between them it's still difficult, put on the wood alcoholic solution of aniline or of iron dichloride, methylene blue or diluted ink.

2

If it is impossible to cut down a tree, use a forest of bushes for incremental borer Pressler. In the right place, take a drill sample. Pull out the cylinder of wood and count the annual rings, as well as on the frame of the trunk. With the help of this device you can also easily measure annual layers.

3

To determine the

**age**and coniferous (pine, spruce, fir, cedar) trees required in the above two methods do not. The age of the conifers can learn counting whorls on the trunk. A whorl is called the fan-shaped divergence of the branches on the trunk**of the tree**. Count the number of whorls. To the obtained value for pine add 3 years for fir – 4 fir – 5, Kedr – 10. Add these figures should, because the first whorl from different trees does not appear in the first year of life. The resulting number will be**the age**of the om**tree**.4

And you can roughly determine

**the age**of the plant, knowing the life expectancy of certain types. So, aspen can't live more than 100 years, often dies at 80 from wood diseases. Oak is long – lived-the average rises to 400-500 years. Yew trees live up to 2000 years. Cypress can live and 4000-5000 years. Sequoia – up to 7000.Note

It should be remembered that in countries with tropical climates, where seasonality is not clearly observed, the counting of annual rings in trees is impossible. For age determination it will require a microscope, which will allow a clear view of the cells of the wood.

Useful advice

Should not be relied upon in determining the age, the thickness of the tree trunk. Under adverse conditions, such as poor illumination, soggy soil, damaged by pests or diseases, fires) the diameter of the trunk of the oppressed tree will be much smaller than plants of the same age, which do not suffer from such effects.