plants and milk

[Kathleen Greco]

My fifth grade daughter is doing her science project on the differences 
between growing plants with tap water, sugar water and milk.  We've done 
our best to control all other variables - light, temperature, potting 
medium, timing, plant variety.  The experiment is going fine - the 
problem we're having is finding suitable resources for her background 
research.  The books we've found that were written for the average 
gardner aren't specific enough about what a plant needs (or doesn't need) 
to grow.  On the other hand, a few articles we've found on the 'net were 
so detailed we couldn't make heads or tails out of them.  Can anyone help 
supply the kind of information we're looking for?

Thanks!  
-
  KATHLEEN GRECO  RFMK45A at prodigy.com