And they’re getting them. A recent UN survey found that agroecology projects in fifty-seven countries have increased crop yields an average of 80 percent, with some being pushed up to 116 percent. One of the most successful of those is the push-pull system, developed to help Kenyan maize farmers deal with pestilence, invasive parasitic weeds, and poor soil conditions. Without getting too technical, push-pull is an intercropping system in which farmers plant specific plants between rows of corn. Some plants release odors that insects find unpleasant. (They “push” insects away.) others, like
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