In order to recycle animal wastes onto cropland
without causing environmental pollution, we need
to equalize the nitrogen load by transporting
composted livestock manure from high-nitrogen
areas to areas with a low nitrogen load. However,
there are problems in both the quality and the
handling of standard composted manure. The
nutrient content of composted livestock manure and
its fertilizer efficiency vary, according to the season,
what the livestock are being fed, and other factors.
The maturity of compost is difficult to define, and a