Published in Scientific Papers. Series A. Agronomy, Vol. LVIII
Written by Olesea COJOCARU
In nature of soil research is done using morphological method was initially used only in botany and geology then wasadopted upon row of all other natural sciences. The purpose of the study is to evaluate morphological and physical properties of the soils with different degree of erosion in the reception basin “Negrea” (Republic of Moldova) based onthe data obtained from six main soil profiles. We made a morphological description of the profiles and developed a soil map at a scale of 1:5000 showing the spatial distribution of soils with different degree of erosion. The diversity of reliefforms, rocks and agricultural land use determine the existence of a variable and complex soil cover consisting mainly of common chernozems (83%). Loam, clay-loam and sandy-dusty soil texture, as well as the unsatisfactory hydrostability of the soil structure are contributory factors for erosion spreading processes on agricultural lands. The soils on slopesare affected by denudation and evolve through a denudation-compensation pedogenesis, it means that there is a certain development of the soil in depth during the relatively long period of slow denudation; thereby pedogenesis compensates, at least partially, the denudation. In the case of the anthropogenically accelerated erosion, resulting frominadequate management practices, great soil losses cannot longer be compensated by pedogenesis. A textural particularity of these rocks is high content of fine-medium sand (20-30%), nonspecific from loesses deposits (5-10%).In the process of performing soil studies it was found that soils on the slopes in the reception basin "Negrea" are affected by denudation and evolves through a denudation-compensation pedogenesis, in the sense that the relatively long period, which is going slow denudation has there is also a certain development of the soil in depth, pedogenesis compensates, at least partially is for the denudation (Florea et al., 1987). According to the results of the determination and calculation values of water reserves in the layer 0-100 cm of soils at this time are practically equal, which is explained by their texture homogeneity.
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denudation
