Glyphosate use in agro-ecosystems [Elektronische Ressource] : identification of key factors for a better risk assessment / presented by Tsehaye Tesfamariam Habtemichael

Institute of Plant Nutrition (330B) University of Hohenheim Prof. Dr. V. Römheld GLYPHOSATE USE IN AGRO-ECOSYSTEMS: Identification of key factors for a better risk assessment. Dissertation Submitted in fulfillment of the requirements for the degree “Doktor der Agrarwissenschaften” (Dr.sc.agr./Ph.D. in Agricultural Science) to the Faculty of Agricultural Science Presented by Tsehaye Tesfamariam Habtemichael Born in Berakh, Eritrea 2009 This thesis was accepted as a doctoral dissertation in fulfillment of the requirements for the degree "Doktor der Agrarwissenschaften" (Dr. sc. agr. / Ph.D in Agricultural Science) by the Faculty of Agricultural Sciences of the University of Hohenheim on 02.09.2009. Date of oral examination: October 7, 2009. Examination Committee: 1. Supervisor and Review Prof. Dr. V. Römheld 2. Co-Reviewer Prof. Dr. R. Gerhards 3. Co-Reviewer Prof. Dr. W. Claupein Vice-Dean and Head of the Committee Prof. Dr. W. Bessei Table of contents  Chapter 1 .......................................................................................................................... 1 1.0 General introduction.................................................................................................... 1 1.2.