agriculture, spreading manure. germany, europe

agricultural agriculture agro ammonia area beings crop cultivated disc earnings economics economy ecosystem europe farmer farming fertilization fertilize fertilizer field germany grafrac14 nlandinjektoren gafrac14 llegrubber tersoh harvest hydraulic industry inject injection injector land landscape liquid machinery management manure mechanization nitrogen north nutrient odor processing regulation rhine slice slurry smell spreader spreading stink suspensions tang tanker technology tractor two westphalia yield