A device has been developed to increase the uniformity of manure distribution across spreading width, to lower the odour and ammonia emissions while spreading and to present a simple construction and reliability against blockage. This device is not constituted of movable parts and rely on its tangential liquid entry that causes the liquid to swirl and build up a back pressure before being evacuated by a central port. With proper diode spacing, the overall distribution of the manure is very interesting and the coefficient of variation is under 10%. Those diodes are installed on a boom close to the soil level behind manure tanks which reduce the odour and ammonia emissions as the manure is applied close to the soil.

This simple system seems to improve the distribution of manure be more efficient than splash plate.