V. Valcheva*, K. Trendafilov, M. Almaliev Department of Agro-chemistry and Soil Science, Faculty of Agronomy, Agricultural University, 12 Mendeleev, 4000 Plovdiv, Bulgaria Abstract. The aim of this study was to investigate the nitrogen mineralization potential of alluvial meadow soil

L. Dospatliev Abstract. The study was conducted on alluvial-meadow, maroon-forest soils and vertisols with Virginia tobacco. The total content of zinc is measured through decomposition by HF, HClO , and HNO acids. A solution of 0.005 M diethylentriaminepentaacetic acid + 0.1 M trietha

The present article summarizes the problematic issues, scientific quests and achievements related with lands reclamation during the past 40 (forty) years. The anthropogenic activities that alter natural landscapes and form a new anthropogenic relief are indicated here, as well as the