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SOIL COVER TRANSITIONS IN THE VRANCEA REGION

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Author(s): Ionut Vasiliniuc | Adrian Ursu | Lilian Niacsu

Journal: Soil Forming Factors and Processes from the Temperate Zone
ISSN 1582-4616

Volume: 9;
Issue: 1;
Start page: 99;
Date: 2010;
Original page

Keywords: soil cover | transitions | horizontal and vertical zonality | azonality

ABSTRACT
In the study area, the soil cover generally respects the principles of horizontal and vertical zonality, with transitions from low plain Chernisols and Aluviosols toward the Preluvosols and Luvosols characteristic for the hilly Subcarpathian area and then to themountain soils belonging to Cambisols, Spodisols and Umbrisols. Normally, this pattern is complicated by the presence of azonal and intrazonal soils such as Protisols and Anthrisols. Frequently, although the profile database was not too large, it can be seen that a part of the physical and chemical parameters respect these transitions. In what regards physical characteristics, can be seen a clear decrease in the fine sand content from the plain to the mountainous area, compensated by an increase in the percentages of silt and coarse sand. In the same direction bulk density decreases, while the soil and upper horizon depths decrease. In the case of chemical parameters, obvious differentiations occur in the case of mobile P content (decrease from Chernisols to Luvosols). Also the exchangeable bases sum and pH decrease, being compensated by an increase in hydrolytic acidity.
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