Also, you can’t just look at the amount of food produced, but the amount produced vs waste, storage and transportation costs. Most things in the garden can stay ripe on the plant for a while and can be picked as needed.

Anecdotally, we were supplying about 80% of our fruit and veg needs on our own garden plot on our standard city residential lot with a family of 7. And we were literally giving tomatoes, citrus and zucchini away as fast as we could.