Szukana fraza: [Abstract = "A growth of thickness in the initial humus accumulation horizon \(Ai\) and an accumulation of organic matter, Carbon and Nitrogen over time was found. A growth of percentage content of Carbon related to a group of humic and fulvic acids in soils was established in the post\-extraction humus compared to remaining Carbon. The data indicates a progressive course or the soil development process under communities from succession on sandpit works."]