Fig. 1. Corn grain yields in the V1 and V2 trials involving two rotation lengths (2 or 4 yr) and four management strategies [zero inputs (ZI), low purchased inputs (LI), high purchased inputs (HI), and organic inputs (OI)] at Lamberton, MN.
Fig. 1. Corn grain yields in the V1 and V2 trials involving two rotation lengths (2 or 4 yr) and four management strategies [zero inputs (ZI), low purchased inputs (LI), high purchased inputs (HI), and organic inputs (OI)] at Lamberton, MN.