Fig. 8. Annualized grain yields (dry mass) at three locations (1 = Sterling, 2 = Stratton, and 3 = Walsh) in three crop rotations for the period 1989 through 1993. The legend indicates location and either observed (o) or predicted (p) value (e.g., 1-p = Sterling predicted). WF, wheat–fallow (rotation); WC(S)F, wheat–corn (or sorghum)–fallow (rotation); and WC(S)MF, wheat–corn (or sorghum)–millet–fallow (rotation).