Absolutely.  I would eat the lettuce and celery for water content and
digestion and the tubers and roots for energy.  I don't need science for
that one but the seasons vary on this one. I just wonder which greens were
available with which roots and tubers.  The roots and tubers had a much
longer shelf life too.  Oliva

----- Original Message -----
From: "Todd Moody" <[log in to unmask]>
you
> get more energy from a sweet potato than from a bunch of lettuce.

they would favor denser foods,
> which would include tubers, roots, and similar concentrated
> plant energy sources.