On our farm, for example, we are able to garner $50,000 an acre in vegetables, because we're able to plant through multiple times. Our biggest cost is labour, but we really work hard on limiting imports. We buy seeds, which we need annually, but we do not have to buy any inputs—fertilizers, herbicides, pesticides, any of those things—the costs of which have become prohibitive.
I like to quote Gabe Brown's saying: I prefer to sign the back of the cheque instead of the front. I think this focus on yield only is a problem. You need to look at the bottom line as well.