Abstract
The study of water and temperature regimes was carried out at the bottom of a 25‑year-old sand pit in the forest-tundra zone of the Yamalo-Nenets Autonomous Okrug (15 km from Salekhard). Based on the analysis of the results of field studies, the dependence of the moisture content of sandy soil on the amount of precipitation (r = 0,58–0,93) was established. In the conditions of the forest-tundra zone of the Yamalo-Nenets
 Autonomous Okrug, the moisture reserves in the agrocenoses of perennial grasses depend on the moisture supply of the growing season and can vary from excessive moisture (in early spring and autumn) to an acute deficit in summer (20–30 % HB in the soil layer 0,4 m).
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