R help - May 2011 - ANOVA Residual SS and MS of 0

I am trying to run an ANOVA on my soil respiration data, but I keep getting
residual sum of squares and mean square of zero. 

As I understand it that would mean that the model terms explain all of the
variation in the response variable. That should be virtually impossible,
should it not?

Where do I begin troubleshooting such a problem?


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> Where do I begin troubleshooting such a problem?
1. By examining your data to see whether you have entered it correctly.

2. By reading the posting Guide at the bottom of this and every
message and doing as it asks (posting a portion of your data and R
code so that we can see what you did).

3. By consulting your local statistician so that she can help you
better understand the nature of your problem and whether you have
appropriate data and methodology to address it.

-- Bert
>
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-- 
"Men by nature long to get on to the ultimate truths, and will often
be impatient with elementary studies or fight shy of them. If it were
possible to reach the ultimate truths without the elementary studies
usually prefixed to them, these would not be preparatory studies but
superfluous diversions."

-- Maimonides (1135-1204)

Bert Gunter
Genentech Nonclinical Biostatistics