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Studies of the effect of litter chicken manure applied in doses of 500-1000 t/ha showed a significant increase in the humus content in soils up to 2.8-5.2%, led to an increase in the content of thermophilic microflora in soils up to 12 · 105 CFU/ g, to an increase in the content of mobile phosphates up to 1200 mg/kg. However, the content of mobile forms of heavy metals (Pb, Zn, Cu, Ni) also increased. The increase in humus content in soils positively correlated with the content of mobile phosphates (r up to 0.5). Keywords: SOD-PODZOLIC SOIL, FERTILIZERS, CHICKEN MANURE, AGROCHEMICAL AND PHYSICO-CHEMICAL SOIL PROPERTIES

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Soil plays a crucial role in carbon sequestration in terrestrial ecosystems. It is known that the strengthening of carbon sequestration processes occurs with a decrease in the intensity of soil treatments. The study of changes in organic matter and physical properties of sod-podzolic soil 16 years after the transition from arable soils to a fallow state against the background of weak water erosion was carried out. A significant increase in the content and reserves of total carbon in fallow soil compared to arable soil was found, mainly due to carbon of the light fraction. On arable soil, the content of the light fraction in the lower part of the field was significantly higher than in the upper part, due to the washing away of light particles as a result of erosion, these differences were smoothed out on fallow soil. There are no significant changes in the density, density of the solid phase and total porosity in fallow soil at this stage of succession, compared with arable soil. In fallow soil, the content of macro-aggregates (including water-bearing ones) was noticeably higher, and the share of micro-aggregates was lower than in arable soil.

Relevance. The use of irrigation is one of the directions of intensification of fruit growing. Drip irrigation is considered one of the promising methods of irrigation, which provides the creation of the most favorable conditions for the growth and development of plants, makes it possible to supply irrigation water directly to their roots and allows the use of automation tools in the irrigation process. The results of ongoing scientific research show that changes in the water-physical and agrochemical properties of soils can be observed on irrigated lands. For the Central Region of the Non-Chernozem Zone of Russia, studies on the influence of drip irrigation on soil properties are fragmentary.Methods. Field studies were conducted on the territory of the educational experimental farm of the Michurinsky Garden fruit growing laboratory of the Russian State Agrarian University - Moscow Timiryazev Agricultural Academy. A two-factor experience in the study of different ranges of moisture for the formation of varietal plum seedlings grafted on plum tree stock was laid in the spring of 2018. Before setting up the experiment, organic fertilizers were introduced in the form of horse manure with sawdust in the amount of 100 t/ha. Soil moisture was controlled using tensiometers, calibrated based on the data of the thermostat-weight method. Irrigation rates were set in such a way as to increase the moisture content by 20% of the lowest moisture capacity. The identification of the main agrochemical and water-physical properties of the soil in the experimental plot was carried out according to generally accepted methods and techniques.Results. The data obtained on the characteristics of the water-physical and agrochemical properties of sod-podzolic soil make it possible to reasonably design the irrigation regime, reclamation and agrotechnical measures. The results of the study show that the local irrigation of soils with sparing irrigation rates with the application has led to certain changes in some soil parameters. However, the obtained research results suggest that in quantitative terms, these changes are not yet significant.