As a support and source of life of higher plants, the soil is one of the essential factors of the biosphere.
In soil, especially humus, are concentrated most of living substances of land and biotic potential energy.
Soil fulfills two essential functions: supplier of nutrients for plants and, at the same time, container and waste transformer, having the protection role of ecosystems and environmental purification.
Due to its ability to maintain plants' life, defined as fertility, soil is the main means of production in regenerative nature agriculture. If it is rational used, soil is not consumed in one production cycle, but keeps it's natural fertility and even it's gaining characteristics and improving qualities.
A good management of soil resources is not possible unless the soil attributes are known, as physical environment of plant life, in close correlation with specific natural conditions in which it was formed and evolved.
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