Position of the cluster and cracking. In
both years, the upper clusters were more prone
to cracking, regardless of irrigation treatment.
For both seasons, linear regressions of cracking
percentage (on the basis of number) on
cluster were significant (P£ 0.01 with r2 = 0.90
for Spring 1990 and r2 = 0.98 for Spring 1992).
Linear regression of cracking percentage on
cluster position resulted in the following