I know! I know! "It depends"! But that isn't helpful!
Not asking how much of a specific crop, i'm asking how much space would it take to grow 100% of all food for a vegetarian family.
Problem with google searching is that they seldom specify whether the numbers they give are of how much space it would take to grow all of the years produce in one sowing or if they are replanting in the same sport after the first crop is harvested. In Mild climates like my dear PNW, we can harvest year round and grow 6-7 months most years. For instance, in the very same article they estimated 4,000 sq feet for ALL a persons food (staples and vegetables), 1000 sq feet per person for vegetables and 2,500 sq feet per person for vegetables. I don't know why the author cant be consistent as to how many square feet one needs for thier vegetables but I suspect that 1000 is replanting the same bed after harvesting and 2,500 is not replanting. What do you all think of the 4,000 sq feet for all food estimate? I read elsewhere that one needs 10,000 sq feet per person for staples but in the PNW we can easily get two, maybe 3 harvests of staples or a combination of staples/vegetable harvests in the same space (ex: quinoa sown in March followed by beans in June followed by Winter rye in September).
Since, of course "it depend", lets say: PNW Washington, intermediately ideal location in regards to soil quality and sunlight, fertilized with manure
compost, human urine, and cover crops. Minimum irrigation (as in not intensively spaced). a variety of vegetables (high yielding and low yielding). Staples including: squash, pumpkin, overwintered potatoes, quinoa, rye and overwintered field beans (again, high yielding and low yielding). Heirloom seeds (not ultra-high yielding hybrids that can't stand weed pressure).
I'd really just like a ballpark estimate. Maybe even an "in my experience, though I don't live in the PNW, my growing season is only long enough to get one harvest of staples and I need (XXXX) square feet of (crop), (crop) and (crop) to feed my family through the year. Furthermore, i need (XXXX) square feet of vegetables which I can start planting in (month) and harvest until (month).