I used a two-way ANOVA to analyze data collected in a randomized complete block design:
Y~Treatment+Block, where blocks represented spatial units
Whereas Treatment had a significant effect on Y, block effects were insignificant.
Does this simply mean that all blocks were the same with respect to the response variable? If that is so, would you it be a good idea to use an ANCOVA to see how parameters collected to describe spatial units affect Y?