A distributor for a manure injection system is disclosed. The main distributor includes a distributor housing with an inlet and a plurality of outlets for distributing a main flow of manure into a plurality of separate streams of manure. A screed barrel is disposed within the distributor housing and has a central opening in communication with the inlet of the distributor housing. The screed barrel includes a plurality of screed holes. A screed paddle is disposed within the screed barrel for screeding the main flow of manure through the plurality of screed holes. A manure distributor associated with the main distributor has a gate shaft with a gate valve disposed in each of the plurality of outlets. A biasing member is operably attached to the gate shaft to bias each gate valve toward the closed position for distributing even amounts of the separate streams of manure to each manure injector.