Work Experience: Student research assistant for Dr. Claudia Kammann, Dept. of Plant Ecology JLU Gießen, Germany and Scientific officer for Prof. Bruno Glaser, Institute of Agricultural and Nutritional Sciences, Soil Biogeochemistry, MLU Halle, Germany. Publication: Busch D., Kammann* C. Grünhage L. and Müller C. (2011): Simple Biotoxicity Tests for Evaluation of Carbonaceous Soil Additives:  Establishment and Reproducibility of Four Test Procedures. In: J. Environ. Qual. (40), S. 1–10.