Why too much phosphorus in America’s farmland is polluting the country’s water

By Dinesh Phuyal, Postdoctoral Associate in Soil, Water and Ecosystem Sciences, University of Florida

When people think about agricultural pollution, they often picture what is easy to see: fertilizer spreaders crossing fields or muddy runoff after a heavy storm. However, a much more significant threat is quietly and invisibly building in the ground.

Across some of the most productive farmland in the United States, a nutrient called phosphorus has been accumulating in the soil for decades, at levels far beyond what crops actually require. While this element is essential for life-supporting root development and cellular…

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