EFFECT OF LONG-TERM AGRICULTURAL USE ON HUMUS SOIL CONDITIONS OF THE SOUTHERN URALS
The results of the analysis of the state of humus chernozems and dark chestnut soils of the Urals, as well as their dynamics is evaluated in a number of virgin land - arable land. Among the identified geographical zoning changes such indicators of humus, as its contents and reserves, the type of humus content of mobile fulvic and humic acids associated with calcium.