Are our yields as high as what we might get if robotic pickers and chemical fertilizers were used? No, but nobody is dying or being abused or getting cancer to make sure that a disgusting, mealy, colorless tomato can be on your cheeseburger.
Are our yields as high as what we might get if robotic pickers and chemical fertilizers were used? No, but nobody is dying or being abused or getting cancer to make sure that a disgusting, mealy, colorless tomato can be on your cheeseburger.
If so, you have completely negated all energy savings.
That said, it's a culture of food production that's really where the efficiency lies. That's people saving and trading seeds, helping each other farm and harvest, and bottling and canning for winter.
That's not only tremendously efficient if it's done locally, it's also fun.
The science is clear, and people in the field don't even question it: high-intensity farming (and living) are the true 'green' way of organizing our society. Low-density, 'farmer's market supported', everything-local is a luxury product, affordable for an elite only, and the popular conception just needs to catch up to that reality.
But I believe the parent comment was discussing the cost in fuel emissions for local farmers producing for ~50 families in his area vs. a mega-farm outputting tons of food for cities across state lines.
And, on top of all that, local food sources are extremely valuable to a large scale sustainable food system. They're a buffer, and a cultural benefit, as agrarian pursuit is a truly healthy way for society to form its social engagement - it's called deep ecology and it's a human need to be engaged and invested with the cycles of life. It's much better than sequestering behind walls in front of TV's as we do now. So, true that it can't provide all our food, but it can provide a damn good buffer, and a lot more value aside from just calories. Don't buy the myth that farm life is slavery - that's an invention of the last century. Generally farm life, when it is done right, is extremely fulfilling. They even had a word for it: bucolic!
There's nothing at all wrong with that! Just don't then make the leap to claim that this is a model for feeding the world.
My produce doesn't beat Walmart prices but then, we don't have the luxury of govt subsidies, scale, and undocumented underpaid labor. Once you start paying people what they deserve, and charging people what it actually costs, the prices are more truthful.
This type of food only seems like a luxury product because the scales are tipped so unfairly towards cheap/bad food.
Think carefully before you decide what is cheaper.
You're also assuming that local, small-scale farming has no impact. In fact to produce the same amount of calories requires vastly more land and more energy and the total impact is larger. Organic farmers also use pesticides and fertilizers; they just use different ones. It's not at all clear they result in less environmental damage. Is spraying a vast amount of nicitinoids over a larger area better than a smaller amount of organophosphates? Not at all clear.