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The tree is the life form of woody plants with a single distinctly expressed long-term lignified lifeless branched main axis trunk.

The total number of trees on planet Earth in 2015 was estimated at 3 trillion; The estimate for Russia is 640 billion trees for Canada and Brazil 300 billion annually. The number of trees on the planet decreases by approximately 15 billion this occurs both as a result of deforestation and climate change.

Pine type genus of coniferous trees of the family Pine. According to modern data in the world there are about 120 species of pine which in natural growth are scattered throughout the Northern Hemisphere from the equator to the Arctic. In the temperate and subarctic climate they form forests on plains and in the subtropics tropics and near the equator grow in the mountains. It is used not only as a source of wood, But also in the chemical and pharmaceutical industries. Fruit-bearing species of pine giving edible nuts conditionally combined under the name of pine. However, we must remember that Cedar another kind of trees of the same family and pine seeds are not nuts in the botanical sense.

Pine belongs to a very light-loving tree species but often forms pure plantations a pine forest. The reason for this phenomenon is that pine being one of the least demanding for the soil of tree species can grow on such infertile soils on which the growth of other trees is almost impossible. This advantage gives the pine a superficial type of root system which can develop in a thin layer of fertile soil lying on the sands. For example, in Karelia pines can have an extensive root system located in a layer only 1 cm thick. Such typical for pure pine plantations are dry sandy soils on which pine forests are planted.

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