SAS program for RCBD with different seasons and different sampling dates.

[FDsas]

Hello! i have conducted a greenhouse experiment with 4 treatments arranged according to a RCBD, I had 4 blocks (replications) and each experimental unit was constituted by 10 pots. during the experiment I have analyzed the soil pH at different dates (4 different dates), on soil sampled every time from a different pot (not the same pot), therefore I think these should not be considered as repeated measures or not? The same experiment was conducted two times during two different seasons (Summer and Winter). Besides evaluating the treatment effect, I would like to compare the two seasons and also the different sampling dates. So I have a few questions:

What will be the best procedure to use in this case? Is the GLM procedure adequate?

How I should consider the season and the sampling dates?

Can you please help me to build the sas program for this case? 

Thanks in advance for your help.

FD 

[SteveDenham]

Just erased everything I wrote, because I misunderstood the design, and I'm still not completely clear.

Is this correct: 4 blocks, 4 treatments gives 16 experimental units, each of which has 10 pots.  Now some of the pots are sampled for pH at 4 different dates.  It appears then that some pots would be sampled 2 times and some 3 times (and it may be something other than that).  On top of that, you have 2 seasons.

Let us know if my assumption about the design is correct, and I might be able to come up with an analysis plan.

Steve Denham