Affiliation: | 1. Department of Plant and Environmental Sciences, Norwegian University of Life Sciences, PO Box 5003, NO‐1432 ?s, Norway, E‐mail: morten.lillemo@umb.no;2. Graminor AS, Hommelstadvegen 60, NO‐2322 Ridabu, Norway;3. Graminor branch Holthe: Volhaugvegen 97, NO‐7650 Verdal, Norway |