ITHACA, New York, Oct. 14 -- Cornell University posted the following news:

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NSF awards $22.5M to continue plant-human communication projects

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Thanks to Cornell-led research, a tomato plant's leaves turn red when its roots signal that soil nitrogen is low, prompting a farmer to fertilize.

A grower may soon be able to see a weather forecast for a hot dry day and signal her crops to close their leaf pores, called stomates, . . .

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