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Chemical Properties Transformations of Copper Waste Heaps from Moldova Noua as a Result of their Afforestation

This paper analyses the chemical transformations of soils from certain copper waste heaps from Moldova Nouă in the context of their afforestation. The analysis is based on a comparison between chemical properties of soils from different areas of the waste heaps, such as the planted and unplanted plateaus and slopes. The soil samples were gathered from soil profiles for each variants considered, and then analysis carried out in the “Marin Drăcea” National Institute for Research and Development in Forestry laboratories. The results were compared and discussed in the context of the waste heaps’ morphologic differences, such as land slope, aspect and the presence or absence of forest plantations. As such, the following elements were analyzed and compared: granulometric composition, soil chemical properties, soil reaction, humus content, total nitrogen, potassium content and heavy metals content. Forest vegetation had an important influence on the soil’s granulometric composition, on the humus and total nitrogen content, as well as on the soil’s reaction. In addition, granulometric composition differences between slopes that are exposed to the main wind and those that are not, suggest the importance of afforestation works for the former.