IMT, Norwegian University of Life Sciences, Ås, Norway. geir.halnes@umb.no|IMT, Norwegian University of Life Sciences, Ås, Norway. geir.halnes@umb.no|IMT, Norwegian University of Life Sciences, Ås, Norway. geir.halnes@umb.no|IMT, Norwegian University of Life Sciences, Ås, Norway. geir.halnes@umb.no|IMT, Norwegian University of Life Sciences, Ås, Norway. geir.halnes@umb.no