Abstract:
The field research took place
between 2019 and 2020, in the upper river
basin of the Raul Alb creek, located in the
northwest of Dambovita County, the
analysed land area being 4034 ha.
Underlying the research of the complex
erosion phenomena faced by the analysed
territory was the soil survey, which consisted
of sampling 46 soil profiles in the
representative areas for the analysed
territory. For the analysis of the soil fertility,
chemical analyses were performed regarding
the pH, humus content, reported to the soil
texture in the topsoil and the supply of
nutrients (nitrogen, phosphorus and
potassium), also physical-mechanical
analysis (soil texture), interpreted according
to the “Methodology for the Development of
Pedological Studies, Volumes I, II, III,
1987”. By centralising the obtained results, it
found that 59.42% of the total analysed land
surface had a weak alkaline pH, at least in
the topsoil, due to the CaCO3 content. For
the supply of humus, the most significant
share is that of the extremely low-supplied
soils with this element in the topsoil, i.e.
73.42% of the mapped area, and in terms of
the nitrogen supply, 26.67% of the total
surface of the river basin shows severe
deficiencies in this element. The situation is
worrying indeed in the case of the supply of
soils with mobile phosphorus, with 3 280.27
ha of the mapped surface having very low or
low contents of this element, making up
81.31%. However, for potassium, the soils
from the upper sector of the Raul Alb
catchment are mostly moderately and well
supplied, with only 620.85 ha (15.39%)
being extremely poorly supplied with this
element.
