R help - Oct 2011 - suggestions for ANOVA which includes the "year" as a factor

Dear R Fundation,

I am a post-doc researcher at the University of Pisa, Italy.
I apologize for my english and I have to tell you in advance that I  
am a very beginner with R.
I used R for fitting dose-response curves (drc package) and for an  
ordinary ANOVA (one, two or three factors), including the post-hoc  
mean comparison (I used the LSD test...).
Now I have to process some simple data on tomato yield. I have just  
three different treatments (weed control....) and three different  
years of experiment.

My questions are:

How can I insert the factor "year" in the ANOVA?
Do you think a mixed system could be suitable?
In case which texts, paper, references, manuals, etc. could you  
suggest me?
How can I compare means in a mixed model (for example LSD test....) ?

Thank you very much and sorry for bothering you.
Sincerely.
Marco

__________________________________

Marco Fontanelli

Sezione Meccanica Agraria e
Meccanizzazione Agricola
Dipartimento di Agronomia e Gestione
dell'Agro-Ecosistema
Facoltà di Agraria
Università di Pisa

tel: 050 2218922
cell: 338 8832323
mail: mfontanelli@agr.unipi.it






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