How much meat produced per acre?>>

Having been a rancher, I can tell you that it depends entirely on the
conditions of the climate.  The more rain per season and the longer the
growing season, the weaker the grass is.  The shorter the season, the
stronger, more nutritious it is.  In the South, (we were in S. Texas) you
have to fertilize heavily in order for the grass to support a herd.  Of
course, in the paleoworld, the animals were not fenced and could follow the
nutrition by migrating.

In the mountains, the grass is very nutritious.  The same in the desert
where it grows quickly and goes dormant quickly.  I have noticed the cattle
grazing here in the desert of Arizona are very healthy, in spite of the
dormant grass.  I guess the nutrients are held in the dry grass.  The
American Bison seem to fare well in the harsh winters of the northern
plains, pushing the snow away from the grass which is protected under the
blanket of snow.

The nutrients in different grasses vary, too.  It is a very complicated
crop.  My DH always said he was a grass farmer rather than a rancher.

Jan in AZ for the winter
who wishes she had known about the benefits of grass fed beef when she was
ranching