As far as grazing is concerned, we have to be careful with where we graze. We can't put our animals on rivers or lakes or things like that. The manure as well as the urine from cattle act as mineral.... Urine provides nitrogen to the soil and many different benefits for the soil.
I think that question is probably more in regard to intensive livestock-type operations, where there is a larger amount of fecal matter, so I'll go to Dennis on that.