Professor Dr. Urs Niggli: Soil Fertility in Organic Agriculture.
9th October 2013. ICOAS Organic Policy Summit. Prof. Dr. Urs Niggli,
Research Institute of Organic Agriculture (FiBL)
http://www.fibl.org/de/mitarbeiter/niggli-urs.html
Seeds and Harvest of Hope -
An evening with Dr. Jane Goodall and Prof. Dr. Urs Niggli
TIPI Workshop: A Vision for Organic Food and Farming Research at the Global Level (Feb 2014)