BULGARIAN HUMIC SUBSTANCES SOCIETY AND AN OVERVIEW ON HUMIC SUBSTANCES RESEARCH IN BULGARIA
Ekaterina Filcheva … 5
SB_20 (Special Issue1)’ 2019-005-028
HUMIC SUBSTANCES, PHYSICOCHEMICAL PROPERTIES AND AGROCHEMICAL CHARACTERISTIC OF STRONGLY LEACHED CHERNOZEM FROM NORTHEASTERN BULGARIA
Toma Shishkov, Ekaterina Filcheva, Margarita Nankova, Milena Kercheva, Emil Dimitrov … 29
SB_20 (Special Issue1)’ 2019-029-044
SOIL QUALITY ASSESSMENT DOWN THE PROFILE OF HAPLIC CHERNOZEMS AS A RESULT FROM 50 YEARS MINERAL FERTILIZATION
Margarita Nankova … 45
SB_20 (Special Issue1)’ 2019-045-053
LONG-TERM LOW-INPUT NUTRITION REGIME OF HAPLIC CHERNOZEMS AND ITS INFLUENCE ON THE PRODUCTIVITY OF T. AESTIVUM L. CULTIVARS
Margarita Nankova, Valentin Savov, Konstantin Chakalov, Ekaterina Filcheva … 55
SB_20 (Special Issue1)’ 2019-055-062
INFLUENCE OF SOIL TYPE AND LAND USE ON SOIL ORGANIC MATTER IN CLIMATE CONDITIONS OF WEST CARPATHIAN MTS. AND PANNONIAN BASIN
Gabriela Barančíková , Erika Tobiašová , Erika Gömöryová, Jarka Makovníková, Ján Halas, Štefan Koco, Rastislav Skalský … 63
SB_20 (Special Issue1)’ 2019-063-070
ORGANIC MATTER CONTENT AND QUALITY OF BULGARIAN SOILS
Ekaterina Filcheva … 71
SB_20 (Special Issue1)’ 2019-071-078
TRACE ELEMENTS AND ORGANIC MATTER COMPOSITION IN STRONGLY LEACHED CINNAMONIC FOREST SOIL FROM PERNIK REGION IN WESTERN BULGARIA
Toma Shishkov, Ekaterina Filcheva … 79
SB_20 (Special Issue1)’ 2019-079-088
MARITSA IZTOK LIGNITE HUMUS MATTER STUDY THROUGH AP-TPR-GC/MS
Maya Stefanova, Stefan Marinov, Jan Czech, Robert Carleer, Jan Yperman … 89
SB_20 (Special Issue1)’ 2019-089-094
CAN HUMIC PRODUCTS SUBSTANTIALLY IMPROVE ECOSYSTEM QUALITY AND ECONOMIC YIELD?
Daniel C. Olk, Dana L. Dinnes, J. Rene Scoresby, Chad R. Callaway, Jerald W. Darlington … 95
SB_20 (Special Issue1)’ 2019-095-110
INFLUENCE OF BIO-HUMATES ON SOME PHYSIOLOGICAL ANSWER OF POINSETTIA
Konstantin Chakalov, Todorka Popova, Valentin Savov, Gergana Angelova-Deleva, Cvetelina Metodieva … 111
SB_20 (Special Issue1)’ 2019-111-115
CHARACTERIZATION OF SOIL ORGANIC MATTER AND PAHs CONCENTRATION IN SPILS AT LIVINGSTON ISLAND, ANTARCTICA
Denitsa Apostolova, Ekaterina Filcheva, Achim Bechtel, Kalinka Markova, Irena Kostova … 117
