A high capacity square baler comprising a pickup mechanism configured to pick up a single windrow of crop material off the ground. The baler additionally comprises one or more stuffer chutes each configured to receive at least a portion of the crop material picked up by the pickup mechanism. The baler additionally comprises one or more stuffer assemblies each configured to push crop generally upward through one of the stuffer chutes. The baler further comprises a plurality of separate bale-forming chambers each configured to receive crop material from one or more of the stuffer chutes and to form a bale of crop material therein.