Here's the main result. An acre of irrigated ladino clover pasture replaces 2,200 - 2,700 pounds of grain, which is the feed requirement of about 2-3 grower pigs, and a feed value of about $600 scaled to the cost of commercial feed. With managed rotational grazing, the yield could probably be a bit better. As a comparison, barley grown for grain produces about a ton/acre, but it much more expensive to get into the belly of the hogs.
I was going to plant red clover, but I think I'm going to go with ladino now. This is really cool!