Determining pedo-ecological factors of a phytocenosis complex (Sintereag, The Valley of Sieu)

The excellent trophic and humidity conditions (good internal drainage) and the complete lack of salts set the conditions to the establishment of the variant with Festuca pratensis - Trifolium pratense, to the detriment of the variant with Festuca pratensis. This denotes that Trifolium pratense is more sensitive to the excess of the humidity and salts. The prolongation of excesive humidity periods on soils with clay contents over 40% is correlated with the establishment of the variants Carex distans, C. vulpina.