The moisture regime puts in value the soil richness in nutrients, making this wealth into actual fertility. One of the essential factors of moisture regime is the extent to which the soil performs the main function of supplying oaks with accessible water and nutrients, which allows good circulation of the air. The soils of Central Plateau of Moldova served as objective of the research. The research was conducted in the areas of samples 12G; 12F and 12A. They were dug and pedogenetical profile was analyzed (0-150 cm). According to the traditional geopedological methodology it was highlighted and characterized the genetic horizon morphology, samples were collected in order to determine the percentage of humidity, pH and CaCO3. Soil typology corresponds to classification (1999; 2004).  From these areas, soil samples were collected once in ten days to determine humidity at depth: 0-5 cm; 5-10 cm; 15-20 cm; 45-50 cm 95-100 cm. The temperature was recorded at depth of 0-5 cm and 95-100 cm. In clay protosoil under sessile oak-beech forest (12G) during the vegetation period in 2014, the percentage of humidity in early May was 23.74% in layer 0-5cm and 17.51% at depth 95-100 cm. A higher humidity degree was recorded at the end of May – 35.61% in layer 0-5cm and 19.36% at depth of 95-100 cm. The average temperature this month (May) was 15.3 ° C and 81.4 mm of precipitation fell. It's very small percentage of humidity in this type of soil in August. It serves as evidence that the end of the growing season exhausted all useful soil water reserves and substantially enhanced evapotranspiration process. Another cause is the lack of rainfall. The percentage of humidity is 6.89% in the layer of 0-5 cm, and at depth of 95-100 cm – 13.34%. The average temperature this month (August) was 21.1 ° C and 17.9 mm of precipitation fell. The temperature in clay protosoil under sessile oak-beech forest was: May – 11.0° C (0-5 cm) and 12.0° C (95-100 cm). In August – 22.0° C (0-5 cm) and 22.8° C (95-100 cm). In gray clay molic soil under hill mixed oak forest (12F), during that period, the following indices of humidity were registered: in May – 36.47% in layer 0-5 cm and 27.63% – at depth of 95-100 cm. A lower level of humidity was recorded in August: 30.23% in layer 0-5 cm and 15.41% at 95100 cm depth. Humidity in the soil is kept well due to the developed canopy of trees that reduces the intensity of evaporation. The temperature of molic gray silty clay soil under the hill oak forest plainly was: May - 11.0 ° C (0-5 cm) and 11.0 ° C (95-100 cm). In August – 23.0 ° C (0-5 cm) and 21.2 ° C (95-100 cm). In the sandy-silty albic gray soil under hill mixed forest with sessile oak and oak (12A), during the vegetation period, the humidity was recorded: in May – 35.33% in layer 0-5 cm and 20.35% at depth of 95-100 cm. A lower level of humidity was recorded in this type of soil in August: 17.81% in layer 0-5 cm and 15.89% respectively at 95-100 cm depth. The temperature of albic gray sandy clayey soil under the hill mixed forest with holm oak was: May – 12.0 ° C (0-5 cm) and 8.0 ° C (95-100 cm). In August – 18.6 ° C (0-5 cm) and 18.2 ° C (95100 cm).            The research shows that the moisture content, during the vegetation period, of clay protosoil under sessile oak-beech forest is lower than molic gray silty clay soil under hill mixed forest with holm oak due to the well developed canopy of trees that reduces the intensity of evaporation. Biochemical processes, in particular anaerobic or aerobic decomposition of organic matter is entirely influenced by the character of the soil moisture regime that highlights the richness of soil in nutrients, making this wealth into actual fertility. Determination of soil moisture on the whole profile has allowed highlighting the distribution and movement of water in soil depending on granulometric composition. One of the essential factors of moisture regime is the extent to which the soil performs throughout the whole period the main function of supplying oaks with accessible water and nutrients, while allowing good air circulation.