my late dad planted mango, star fruit, citrus, durian, guava. i have fond memories about it ^@^ now i'm thinking about it, fruit is nature's fast food -- just

my late dad planted mango, star fruit, citrus, durian, guava. i have fond memories about it ^@^ now i'm thinking about it, fruit is nature's fast food -- just pick and eat it up. just dump the remains on ground (bio-degradable by default) no fridge is needed (a living plant IS the nature's fridge) even further, the water content can be quite pure (think plant as nano-bio-filter); i guess it's very hard to get fruit contaminated with heavy metals. i like the 'bio sensor' ... if fruit looks bad and/or smells rotten, then it's probably not safe to eat i wonder about the feeding-people efficiency of fruit farmden compared to corn field. for example, if i have a family of 2 and 100 m² land, what to plant for self-sustainable* garden? i do think gardening as 'depression-proof' * self-sustainable in the sense that a garden is a close-system. it only needs water and sun. pest control by ducks/chickens. herb control by planting diverse plants (allelopathy). fert is provided by composting loop.