The use of arable lands in the center of Moldova in rotation with 5 fields, where one field was occupied by a mixture of grasses (alfalfa + steppe ryegrass, sainfoin + ryegrass steppe), the aerial mass of grasses used as forage, contributed to restoration of degraded soil characteristics and the formation of a balanced content of humus in the soil. In the 6th year the grassy strip returned to the soil about 25 t/ha (absolutely dry units) of organic debris and roots of herbs (5 t/ha/year) with average nitrogen content of 1.9%. Organic matter content in the 0-30 cm layer increased by 0.20% or 0.04% annually. As a result of multi-herb fallow from the soil roots contribution and perennial crop residues partially restored the structure, increased the favorable agronomic aggregates, decreased bulk density of the degraded arable cambic chernozems