Children were diving in from each other's shoulders, adults were winnowing with Frisbees and everyone was spreading wheat all over the place, which was a really good idea because there were a kazillion people in the Polo Field that day and the park grass took a beating.
Wheat sprouts fast.
When the day was ending, there was an announcement that any wheat left in the pile should be liberated, and I took home a big string-handled bag of it, thinking of green manure for the yard. There is wheat all over San Francisco still, because of that day. There are street trees in the Haight-Ashbury with wheat coming up around them year after year. I green-manured some of it, and grew some to maturity. I've been growing it ever since.