Published in Scientific Papers. Series A. Agronomy, Vol. LXV, Issue 1
Written by Anca Rovena LĂCĂTUȘU, Daniela RĂDUCU
Soils “are alive” due to the high activity of their biota. But, when named soils in different classifications the biological activity is more or less ignore. This paper brings biodiversity in the centre of the soil genesis and evolution, and emphasized its activity that modelling the habitat and consequently generating pedofeatures specific to each soil. The researches had been performed on two Greyzemic Phaeozems. Their main morphological characteristic is the presence of the „uncoated silt and sand grains on structural faces in the lower half of a mollic horizon‟ (WRB-SR-2014). The micromorphological observation located the areas with the uncoated silt and sand grains in the old macrofauna coprolites, integrated into the soil groundmass. The macrofauna also brings from the deeper horizons, soil material (more clayey and less humic) compensating in this way plasma eluviation. On the general background of pedolandscape characteristics (relatively mobile soil plasma containing fulvic acids - in Ame horizon exclusively; clayey loamy texture; and climatic conditions) the soil biodiversity modelling its habitat and created specific pedofeatures helpful for soil classification.
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