ИСТИНА

Gardening of urban areas is often connected with a need of formation of a soil cover – konstruktozem. During its creation, as usual, use soil layers, which are highly contrasted in the physical and chemical properties such as: sand, peat, soil (lowermineral horizons). Similar layers united in a general system have new properties and modes. In the process of their functioning soil constructions are exposed to fast transformation. And, changes of properties concern not only quickly changing phases, but also slowly changing firm phase of soils. Similar evolution of soil constructions conducts to their degradation. Creation of steady soil constructions is an important problem of their use, in particular in city gardening. In 2012 on the territory of the Moscow State University were created 28 soil designs of a different structure and they were sowed by grassy vegetation of Festuca Rubra and Olium Perenne. At all constructions identical conditions were supported. Regular researches of physical and chemical properties and modes of soils were conducted. It is established that specifications of a structure of a soil profile significantly influence on growth and development of plants. Changes in properties of components of a firm phase are found.