Back to profile profile_subnav_publications - ing. HCA (Bert) Rijk The most important publications (highlighted by the author). Genetic progress in Dutch crop yields Bert Rijk, Martin van Ittersum, Jacques Withagen (2013) Field Crops Research The crop yield gap between organic and conventional agriculture Tomek de Ponti, Bert Rijk, Martin K. van Ittersum (2012) Agricultural Systems Other publications Wageningen University & Research