I do not fully understand this question...
But just out of experience would you say that plants vary a little or a lot in their efficiency at producing joules for human consumption. And could you suggest reasons for the variation?
Science/ECology - Ms. Sue, Sunday, September 7, 2008 at 1:49pm
This site may help you.
Science/ECology - bobpursley, Sunday, September 7, 2008 at 1:53pm
Hmmmm. Some plants produce a lot of cellulose, and humans cant digest any of that. Plants produce oils, sugars, and some protein, and humans can digest those.