Overall, the high and medium
zones delineated using the SCMZ exhibited higher grain
yields than the corresponding management zones delineated
with the YBMZ technique, indicating that the
SCMZ technique is accurately characterizing the highand medium yielding areas of the field. Grain yield
differences were significant in 12 out of 25 yield comparisons
across the three site years between the SCMZ
and the YBMZ techniques (P # 0.05). Management
zones delineated using the SCMZ technique were up to
1.88 Mg ha21 higher than the corresponding YBMZs
(Table 1).