One barrow-full of the many more barrows-full that are still on the lawn. The manure rake is the best tool for walnut removal. Walnuts are about the same size as horse buns. It's perfect.
@narayani Yes, they are edible but they are a lot of work. The (not really) joke about opening is that you leave them in the driveway until the outer husk blackens and then you run over them with the pick up truck.
