Is wheat the most impactful-per-area crop? Would other crops yield sufficient quantities in smaller areas compared to wheat? As others mentioned, the original

Is wheat the most impactful-per-area crop? Would other crops yield sufficient quantities in smaller areas compared to wheat? As others mentioned, the original idea is to supplement, and not replace. If every household strove to grow at least some of its food, we could probably reduce our need to transport, store, and distribute edibles by a non-insignificant amount. And the GP's point especially revolves around the lack of effort involved. While some crops require a lot of preparation and attention, in the case of "weeds" like dandelion, the effort can be no greater than walking outside and pulling them from the ground.