1. a Research Institute of Organic Agriculture (FiBL) , Ackerstrasse, CH-5070, Frick, Switzerland
2. b Postgraduate Studies on Developing Countries (NADEL) , Swiss Federal Institute of Technology , CH-8092, Zurich, Switzerland
3. c International Competence Centre for Organic Agriculture , 951 C, 15th Cross, 8th Main, Rajarajeshwari Nagar, IN-560098, Bangalore, India