It was noticed long ago: on those plots where there are a lot of earthworms that work more actively, the crop of fruit, berries, vegetables and other cultures is always abundant. These worms do not cause any harm as some people think, but on the contrary, they are very useful as they enrich soil with organic chemistry, aggregate and loosen it.

Earthworms eat various plant residues, tightening blades and leaves laying on soil surface in their burrows. Firstly, they soften rough vegetative mass with a special liquid and then swallow it together with lumps of ground and tiny pebbles necessary for crushing food. Secretions contain a lot of humus readily assimilable by plants and also calcium. In a compact ground worms "eat" a road to themselves, passing through themselves a plenty of soil and enriching it with organics. Moving, making passages and burrows, they promote better penetration of water and air into soil. Earthworms are very durable: even if to split a worm into some parts with a shovel, each part will not be lost and is able to develop in an adult individual. But worms suffer very much affliction from drought and high temperatures, therefore maintenance of soil in a damp condition and mulching of vegetative mass are favorable not only for plants, but also for vital activity of earthworms. There are always more of them under heaps of peat and humus that can be specially used for reproduction of worms.