SAS program for Split plot with subsampling in repeated measures???

[rogerchl]

Hello.

I have a split plot desing with subsamplig, in repeated measures over time.

The whole-plot factor is "water" with 2 levels.

The split-plot factor is "fertilization" with 3 levels.

There are 3 "blocks".

In total there are 18 subplots (2 x 3 x 3)

In each subplot, the diameter increment of 3 trees were measured (subsampling) over 3 years at monthly intervals (36 measurements per tree).

I want to know the effects of water, fertilization, time, and interaction, as well as multiple comparisons between the treatments.

Which model should I use for my data? How to write the model in SAS?

Thank you.

[tw1]

I think that this paper will help you.

Paper 188-29
Repeated Measures Modeling With PROC MIXED
E. Barry Moser, Louisiana State University, Baton Rouge, LA

[tw1]

and this paper

Paper SAS026-2014
Analyzing Multilevel Models with the GLIMMIX Procedure
Min Zhu, SAS Institute Inc.