Till now we considered the processes occurring in separate organellah, cages, fabrics or the whole plants. however in the plant nature form communities (tsenozy) where one individual can influence another, competing to it or promoting its growth. Physiological conditions in tsenozah are not identical to what there is a single plant as on the Wednesday surrounding the separate individual, other plants essentially influence: really, they make a part of this environment. The modern person manipulates tsenozami, growing up garden and field cultures in one-specific communities (monoculture), using then some products in the form of food, a forage for animals, fibres or other special materials. if the farmer understands growth conditions in tsenoze, it can operate them for the purpose of reception of an optimum crop. Usually this management takes the form of character and density regulation tsenoza, maintenance of plants with water and fertilizers, elimination of competitors and wreckers.

The Majority of the plants used by the person, are grown up in the form of mass field communities, but some are cultivated in the special conditions allocated as gardening. Gardening is an intensive form of plant growing at which value of each separate plant or its product (for example, fruits) is high enough that it was more important to receive high-quality separate copies, than a considerable quantity or the big weight of a product. in gardening practice of a plant it is possible to make multiple copies and process individually for reception of a desirable commercial product. In this chapter we will consider features of the cultural plants growing in tsenozah, and the physiological receptions used by farmers for increase of value of the received product.

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