Authors
Dora Krezhova
Space Research and Technology Institute, Bulgarian Academy of Sciences, Sofia, Bulgaria
Antoniy Stoev
Institute of Soil Science, Agrotechnology and Plant Protection, Bulgarian Academy of Agriculture, Kostinbrod, Bulgaria
Nikolay Petrov
Institute of Soil Science, Agrotechnology and Plant Protection, Bulgarian Academy of Agriculture, Kostinbrod, Bulgaria
Svetla Maneva
Institute of Soil Science, Agrotechnology and Plant Protection, Bulgarian Academy of Agriculture, Kostinbrod, Bulgaria