Production of several key crops is increasing in some parts of the world, but a study reports that in up to 39% of growing areas of corn, rice, wheat and soybeans, "yields either never improve, stagnate or collapse." "This finding is particularly troubling because it suggests that we have preferentially focused our crop improvement efforts on feeding animals and cars, as we have largely ignored investments in wheat and rice, crops that feed people and are the basis of food security in much of the world," said Jonathan Foley, co-author of the study.

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