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I think that's why it's good to rotate beans or plant clover cover crop.

Three Sisters: Corn, Beans, Squash: https://en.wikipedia.org/wiki/Three_Sisters_(agriculture)

Companion planting: https://en.wikipedia.org/wiki/Companion_planting

Nitrogen fixation: https://en.wikipedia.org/wiki/Nitrogen_fixation



From https://news.ycombinator.com/item?id=43764441 :

> "Discovery of nitrogen-fixing corn variety could reduce need for added fertilizer" (2018) https://news.ycombinator.com/item?id=17721741




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