The results of the study of climatic and soil conditions of the Lower Dnieper Sands on the example of Sagi Wildlife Reserve are presented. The weathers structure of climate is estimated, a new method for constructing the resulting transfer rose vector is presented. The average diameter and statistical indicators of Betula borysthenica Klokov were determined. The structure of the soil profile was studied at three characteristic points of the mesorelief of the territory: at the top of the dune, at its foot and in the birch curtain located in a topographically low area. The hardness of the soil was determined, which increases to 37 kg per cm2 with a depth of 14 cm, which is a sign of severe conditions for seed germination and root penetration into the soil. The bulk density of soils reaches 1.7 g cm-3. By particle size distribution they are characterized by medium size, homogeneous. The soil filtration coefficient at the studied points varies from 2.5 to 11.3 mm per min. It was established that even sparse dry grassy vegetation with dangerous gusts of wind up to 13.2 m per second at a height of 2 m reduces its speed at a height of 8 cm to 2.3 m per second.
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