Same farms, different answers: When nitrogen pollution estimates don’t add up

November 13, 2026 · 11:00 pm 1 sources

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• Same farms, different answers: When nitrogen pollution estimates don't add up
  Phys.org · November 13, 2026 23:00
  To reduce nitrogen pollution stemming from synthetic fertilizer and livestock waste, California's Central Valley relies on five data sets to estimate surplus nitrogen. However, most parts of the United States use just one or two data sets—the U.S. Department of Agriculture's agricultural survey…