Tuesday, at the end of the classes – a lesson in chemistry as usual … But not quite. Under the leadership of Mrs. Hristina Dimova, a teacher of chemistry and environmental protection at PGRE “G. S. Rakovski”, students from her class have set up an experiment. Its results will be […]

How to protect soil from mineral fertilizers










  Soil in bulgaria. why we have to save the soil from Nikolay Nikolov  

Soils in Bulgaria