Nitrogen addition reshapes elemental distribution within soil aggregates: availability and stoichiometry of carbon-nitrogen-phosphorus-sulfur in a mown meadow steppe

The effects of N addition (0–50 g N m-2 yr-1 applied as (NH4)SO4) and mowing on the availability and stoichiometry of carbon (C), nitrogen (N), phosphorus (P), and sulfur (S) within aggregate fractions (large macroaggregates: >2000 μm; small macroaggregates: 250-2000 μm; microaggregates: <250 μm).