A new type of feed crop harvesting system. The feed crop is cut as in the prior art. A vacuum is used to lift the relatively moist feed crop off the ground and blow it into a mobile storage container. The feed is allowed to compress under its own weight within the storage container. Three or more harvesting cycles can be used to completely fill the storage container. Multiple containers can be used to harvest large feed crops. The containers are then parked in a convenient location awaiting winter. When winter arrives, the feed containers are towed to the feeding area. Doors in the lower portion of the containers are opened to allow access to the feed.