THE MAIN ANTHROPIC SOILS (SPOLIC ENTIANTROSOILS) ENCOUNTERED IN THE MINING BASIN OF OLTENIA ON SURFACES AFFECTED BY SURFACE QUARRIES PUBLISHEDAna Maria Dodocioiu, Romulus Mocanu, Elena Rosculete
The economic activities that produce radical changes to soils are mainly represented by mining industry by surface coal extraction. The surface mining is the most aggressive for of soil degradation. After the surface mining, by excavation and depositation processes the damage on soil is harsh, the soil factor totally dissapearing and at the surface there appear new downward rocks. These soil types are brand new in this domain of anthropic soils and we emphasize the physical and chemical features of them, their fertility degree and their classification. There have been analyzed the following anthropic soils: spolic entiantrosoil Sandy silty on sands from Berbesti Rosia de Amaradia mining basin; spolic entiantrosoil silty on silt from Motru – Valea Manastirii mining basin; spolic entiantrosoil Silty sandy sandy on sands from Rovinari – Rapa mining basin; spolic entiantrosoil clay silt on clays from Rovinari Rapa mining basin; spolic entiantrosoil sandy silty/silty sandy on sands and silt from Turceni – Balteni mining basin; spolic entiantrosoil silty on silt from Turceni – Urdari mining basin. These anthropic soils have the following physical and chemical features: the soil reaction is highly acid to moderate alkali (pH = 4.9 – 8.5); the organic matter content is between 0.16 to 6.09%; the available phosphorus content is 3.2 – 49 ppm low to well supplied; the available potash content is 22 to 172 ppm very low to average supplied; the sum of exchangeable bases (SB) 7.2-39.5 me/100 g soil; the bases saturation degree (V) is around 74.5%; the texture is heterogenous from sandy to clay – silt yet predominates the sandy silty materials, silty or silty sandy (60%). On the soil profile the soil can homogenous or heterogenous as texture, color, compactity and consistency. They have no structure. The paper is original being the first complex study on entriantrosoils from mining zones in order to classify these soils.
spolic entiantrosoil; sterile dumps; soil reaction; bases sum; available phosphorus; available potassium