Spatial heterogeneity of the content and reserves of humus of virgin light gray forest soils of the south of the Tyumen region

The results of the analysis state humus in virgin light gray forest soils south Tyumen region are presented. A total 96 full profile sections were made and described, soil samples taken for laboratory studies. processed MS Excel using Descriptive Statistics tool. It was revealed that subtype has a low content upper part - 2.07±0.47 %. sharp decrease down established. In A1A2 horizon, average sample is 1.09 % with fluctuations from 0.61 to 1.65 Humus formation studied an accumulative nature, since above-average predominate analyzed sample. nitrogen horizon A1 0.11±0.03 at carbon ratio 11.2±1.0. Down profile, sharply decreases, which associated leaching water-soluble compounds. On average, reserves 38±11.7 t/ha, half 0-100 cm layer. When involved arable land, nutrient regime agricultural crops will be formed exclusively due horizon.