INFILTRATION OF SLURRY LIQUID AND AMMONIA VOLATILIZATION FROM PIG AND CATTLE SLURRY APPLIED TO HARROWED AND STUBBLE SOILS

A large amount of the ammonia present in the atmosphere has volatilized from animal slurries added to agricultural fields. This loss of ammonia (NH3) causes both an unwanted decrease in fertilizer efficiency and an unwanted increase of nitrogen in oligotrophic waters. The effects of soil and slurry type on the infiltration of slurry liquid into soils, either pre-tilled with a harrow or in stubble, and how this in turn affects ammonia...