Heat helps late-planted corn
GRAND FORKS -- Corn should be knee-high by the Fourth of July, the old saying goes. The updated version of the adage is that to get a good harvest, corn should be waist-high by the Fourth.
Most of the Upper Midwest corn crop wasn't waist-high this Fourth, the result of a wet spring and late planting. But a burst of warm weather in late June and early July accelerated growth and raised optimism.
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