B. HRISTOV1, E. FILCHEVA1, I. NIKOVA1, A. ZDRAVKOV2, K. RUSKOV2, D. PETROV2 and D. BAKARDZHIEV2
1 “N. Poushkarov” Institutе of Soil Science, Agrotechnologies and Plant Protection, BG – 1080 Sofia, Bulgaria
2 University of Mining and Geology “St. Ivan Rilski”, BG – 0000 Sofia, Bulgaria
HRISTOV, B., E. FILCHEVA, I. NIKOVA, A. ZDRAVKOV, K. RUSKOV, D. PETROV and D. BAKARDZHIEV, 2013. Fractional composition of organic matter in surface horizon of soils from Bobov Dol Valley. Bulg. J. Agric. Sci., 19: 485-489
The paper deals with the content and composition of organic matter of soils polluted with ash from Thermal Power Plant “Bobov Dol”. Coal impurities have impact not only on the amount of total carbon but also on the type of humus. Fine ash particles are deposited in the northern part of the valley, and they had change the composition of organic acids, where now humic type of humus dominates. The average amount of organic carbon increases in the surface horizon since 1979. It could be considered that this increase is due to 36 years of TPP “Bobov Dol” operation.