Enzymatic Activity of Degraded Soils versus Enzymatic Activity of Entiantrosoils Resulting Through Dumps Leveling from Surface Mining Excavations Letca – Surduc County of Salaj

By surface mining degradation without a selective topsoil of layer vegetation that later to cover the leveled sterile waste dumps radical changes take place in biological activity. Thus results with very low natural fertility. Enzymathic activity (dehydrogenase, catalase and saccharum on entiantrosoils) has values much lower compared to degraded soils. Covering waste dump material (entiantrosoil) even with 10 cm layer plant would be biological the ”sowing” which would contribute to faster restoration of these ”soil fertility`s”.