A portable dispenser apparatus for bulk bags is mounted on a longitudinally extending frame that is suitable for mounting on a trailer or a truck. The bags are mounted on a platform with an opening under which is attached a chute and an auger. The platform is supported on the frame such that the chute and auger fit under the platform as close as possible to the ground and, in a preferred form, so that the auger can be pivoted and rotated. Material flows under force of gravity from the bag, through the opening, down the chute and into the auger from which it is supplied to a planter, grinder mixer, spreader and so forth. When the bag has a spout a cinch or the like is provided to check the flow.