Study Reveals that Nitrogen Fertilizers Deplete Soil Organic Carbon

By S.A. Khan, R.L. Mulvaney, T.R. Ellsworth and C.W. Boast. CSA News December 2007. After analyzing soil profile samples from the historic Morrow Plots and studying published research covering more than 100 years, the authors found consistent evidence of an organic carbon decline for fertilized soils. "Inorganic nitrogen has long been known to promote decomposition of carbonaceous residues..." explains Richard Mulvaney.

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