For adding liquid inoculants to grass and corn pits during silage. The SDP system is a self-priming system that distributes the inoculants over the silage under high pressure. The system must be mounted on a container mounted on a forage harvester, pick-up truck or baler. The set consists of: membrane pump, molded controller, 10m cable, 1m PVC tube (12.5mm I / D braided), strainer, various spray nozzles. Optionally with a water tank and / or flow meter.\