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A cool guide Homestead on One-Tenth of an Acre
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No, you cannot source all of your food that way. Only the vegetables. You still habe to get grains from a machinally-farmed farm. It says so in the description (4).
Im only referring to raw human survivability.
Whether this amount of growing space could produce enough calories per year to keep 1 human at "barely alive or better" caloric input.
In my estimate, you would need to devote most of the land to potatoes, and rely on eggs, rabbit meat and likely some wild foraging for the rest. It probably is feasible if you do the above.