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The global average yield of potatoes per acre is about nine tons. Van den Borne’s fields reliably produce more than 20. http://www.nationalgeographic.com/magazine/2017/09/holland-agriculture-sustainable-farming/

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A conversation with van den Ende is a white-knuckle ride on a torrent of brainstorms, statistics, and predictions. African drought? “Water isn’t the fundamental problem. It’s poor soil,” he says. “The absence of nutrients can be offset by cultivating plants that act in symbiosis with certain bacteria to produce their own fertilizer.” The soaring cost of grain to feed animals? “Feed them grasshoppers instead,” he says. One hectare of land yields one metric ton of soy protein, a common livestock feed, a year. The same amount of land can produce 150 tons of insect protein.

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