The paper presents results of an investigation on Technosols. The soils are located in “Podgumer” quartz quarry, village of Podgumer, district of Sofia, Bulgaria. Samples were collected upon deposit, 5 and 9 years after deposit. A phytocenological description was made 5 years after deposit and 9 years after deposit. Soil samples were taken from forty-five soil pits at a depth of 0-20 cm. The vegetation in the area is related to the rhizome - leguminous stage. There are statistically significant differences (a downward trend) in the bulk density of the samples collected 5 and 9 years after deposit. There is a statistically significant increase in total porosity after the establishment of vegetation. The presence of vegetation also results in statistically significant changes in the chemical characteristics (pH, SOM, TKN, P₂O₅, K₂O). The establishment of vegetation and the increase in plant diversity result in the increase in TKN, P₂O₅, K₂O, where existing changes have been described using reliable linear regressions.