What is plant soil? Detailed answer

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What is plant soil? Detailed answer

Big encyclopedia for children and adults

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What is plant soil?

There are many substances in the soil that create the conditions for plant growth. Soil is a mixture of organic and inorganic substances. The organic part consists of living organisms and the remains of once living organisms. The inorganic mixture is particles of rocks and minerals. Soil organic matter is called humus.

Humus separates densely packed rock particles, thus creating conditions for soil ventilation and easier water access. Humus also provides food for bacteria and other microorganisms in the soil. These microorganisms die, decompose, forming substances that the plant can absorb well. Therefore, humus is very important for soil fertility, it helps the plant to develop.

A large number of living beings live in the soil. Earthworms are very useful. They rake up the earth, loosen it, and thus improve it. Microorganisms living in the soil feed on particles of organic matter. It turns organic matter into minerals, gases and liquids. These waste products decompose further, and as a result, a new combination of basic elements is created.

Plants can use these substances for their growth. There are 10 elements necessary for plant growth. These are oxygen, hydrogen, carbon. They are present in both air and water. But you also need elements that the plant receives only from the soil. These are nitrogen, phosphorus, potassium, calcium, magnesium, iron and sulfur.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

What mistake led to the appearance of a mythical animal on the coat of arms of the Irkutsk region?

The old coat of arms of Irkutsk depicted a babr (as the Ussuri tiger used to be called) holding a sable in its mouth. In the decree of the Senate of 1878, a mistake was made in the description of the coat of arms - a beaver appeared instead of a babr. The artists had to add a large beaver tail and webbed hind legs to the babr, creating a new mythical animal.

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