Hi! I have a Split-plot with 3 Factors; nematode, treatment and cultivar, plus block. The design is unbalanced because not all levels of the factor "nematode" have the same number of replicates. Additionaly, is also an incomplete block because one of the 4 blocks only contain 2 levels of "nematode", and only one level of "treatment". There is still another limitation; not all the levels of "cultivar" correspond to each of the level of "nematode". For example, the cultivar Nord was only planted where nematode A and B are, but not where nematode C is. Cultivar Sang, where only planted where nematode A and C are, but not where B is, and cultivar Beretta was planted where nematode B and C are, but not where A is. So taken these limitations into account, I would first like to know which design do I have exactly? I analysed the data using the by statement (by nematode and by cultivar), but the problem is that analysing the data separatly (first by nematode and then by cultivar), I loose degrees of freedom, so better to analyse it toghether in a properly way. I would greatly appreciate some help! Caroline
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