Fig. 2. Inter-annual yield variability of (A) corn, (B) soybean, and (C) wheat phases of a 3-yr corn–soybean–wheat rotation at the the W.K. Kellogg Biological Station Long Term Ecological Research (KBS LTER) from 1993 to 2004. Values are means ±SE, n = 6; except NT, where n = 5. Treatments sharing the same letter are not significantly different at P < 0.05, Tukey HSD. Management systems are CT, conventional; NT, no-till; LI, low-input; and ORG, organic.