Abstract: The apparatus produces batches of mixture in first and second mixing chambers containing liquid, each chamber having a liquid port and a mixer. A valve, communicating with the liquid ports, controls liquid flow relative to each chamber, and a main pump and conduit communicates with the valve to displace liquid. A staging tank communicates with the conduit to receive liquid therefrom and has a main discharge port for discharging into a dispersal container. The staging tank is elevated to permit a rapid gravity feed into the dispersal container, so as to reduce waiting time. A shredder to shred material within a hopper prior to discharge into the mixing chamber can be provided. The method of the invention permits the discharging of a first batch of mixture from the first chamber to the staging tank from where it can be dispensed, while preparing a second batch in the second chamber, which is then discharged to the staging tank.