Keywords: microorganisms, biological activity, optimization, sod-podzolic sandy soil

// Мелиорация.— 2015. – № 2(74) – С 113-123

Adding of peat-manure compost and loam to the sandy soddy-podzolic soil had a positive impact on its agrochemical properties. As a result the number of microorganisms of different physiological groups and activity of hydrolytic enzymes increased. The number of bacteria of the nitrogen cycle increased significantly, what is important for increasing the fertility of sandy soils. Activation of biological processes in the optimized sandy soil stimulated the formation of high yields of potatoes and barley.