Fig. 2. Contour maps of deviations from the mean predicted value for DM (dry matter) yield (kg ha^–1), crude fiber (CF) concentration(g kg^–1 DM), sugar concentration (g kg^–1 DM), and N concentration (g kg^–1 DM) of Fields 8, 9, and 10 (from left to right) of the Van Wijk farm in June 2004. The black dots indicate the location of sampling.