R help - Feb 2013 - post hoc comparisons of the interaction of factors

Hi everyone, I'm running the following analysis for two meadows and two
periods. I need to get the post hoc comparisons for the combination of the two
factors (meadowA*PeriodA, meadowA*PeriodB, meadowB*PeriodB, meadowB*PeriodA). I
use the function glht glht(model, linfct=mcp(Meadow="Tukey") in order
to get results just for the meadow factor. However I need to get the results for
both Meadow*Period. Does anyone know how to do this? Thank you in advance,
Vasillis lme(Yield~1+Meadow*Period, random=~1|Site/Area/Quadrate,     control =
lmeControl(       maxIter = 10000, # Of course       msMaxIter = 5000, # it
helps       niterEM = 500, # to be       msMaxEval = 500, # patient!      
msVerbose = TRUE, # Loquacity ...       opt = "optim" # Optional, and 
# often useful       ),data=Data, weights=varPower(),    
correlation=corRatio(form=~1|Site/Area/Quadrate,nugget=T),    
method="ML")->model

Vasillis Papathanasiou,
Marine SciencesPalaion Fokon 35-37Thessaloniki, 54454Greecetel:+306945874855
	[[alternative HTML version deleted]]