We grow a lot of rocks here in SW MO. This is the newest version of my youngest's creation of a "rock screen", used at the newest garden spot. This one is about 15' tall, and the screen is about 4' wide ... wide enough to handle a skid steer bucket. It works great!!
The first version of this contraption was much smaller, and happened about 12 years ago when we had our first garden here ... that was for the garden in town. That year we also had a garden in the country at one of the farms the boys' used to work for. No screen for that garden ... they just used 5 gallon buckets to pick up the rocks, dump into the truck bed, and then haul it away to a big pile. They hauled out 44 truck bed loads of rocks from that garden.