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Research on weed biology and ecology, Improving non-chemical control of weeds on arable land, Weed management on hard surfaces and urban areas, Evaluation of the efficacy of herbicides, Management of invasive plants
1995: Expert on water and nature protection
1993: Dr. sc. agr., PhD thesis on weed suppression by winter wheat cultivars
1988: Degree in Agronomy, Georg-August-Universität Göttingen, Germany
1982: Education to farmer and working on 3 farms in Germany