"Jim Webster" > wrote in message ...

> no, you just don't understand what you are talking about I'm afraid.
> The increased fertility of the lowlands is also due to grazing, grazing can
> be used to improve land where land is capable of being improved through
> grazing

'Worldwide, grasses of more than 10,000 species once covered
more than 1/4 of the land. They supported the world's greatest
masses of large animals. Of the major ecotypes, grassland
produces the deepest, most fertile topsoil and has the most
resistance to soil erosion. Livestock production has damaged
the Earth's grassland more than has any other land use, and has
transformed roughly half of it to desertlike condition. Lester
Brown of the Worldwatch Institute reports that "Widespread
grassland degradation [from livestock grazing] can now be seen
on every continent."
...'
http://www.apnm.org/waste_of_west/Chapter6.html