Manure nutrients help build and maintain soil fertility. Manure also improves tilth,
increases waterholding capacity, lessens wind
and water erosion, improves aeration, and
promotes beneficial organisms. When wastes
include runoff or dilution water, they can
supply water as well as nutrients to crops.
The economic value of manure fertilizer is
calculated from its available nitrogen (N),
phosphorus (P), and potassium (K) at commercial fertilizer prices. These values
change with the costs of fertilizer and handling practices.
