Relationships between soil N₂O emission rate (NE, mg N₂O m^-2 h^-1) and water filled pore space (WFPS, %) under different tillage and fertilizer treatments in the corn fields at the Tennessee State University Agricultural Research Center in the southeastern US.

<p>An exponential equation [NE = NE₀×exp(b×WFPS) is applied, where parameter NE₀ is basal soil N₂O emission when WFPS = 0, and b is related to soil water sensitivity] (parameter estimate ± standard error).</p><p>Different capital letters in the same column indicate statistical significance at <i>α</i> = 0.05. * and ** indicate significant at α = 0.05, and 0.01 levels, respectively. NT-URAN = no-tillage + regular applications of URAN; NT-inhibitor = no-tillage + regular applications of URAN + nitrification inhibitor; NT-biochar = no-tillage + regular applications of URAN + biochar; NT-litter = no-tillage + chicken litter; NT-split = no-tillage + split applications of URAN; and CT-URAN = conventional tillage + regular applications of URAN.</p><p>Relationships between soil N₂O emission rate (NE, mg N₂O m^-2 h^-1) and water filled pore space (WFPS, %) under different tillage and fertilizer treatments in the corn fields at the Tennessee State University Agricultural Research Center in the southeastern US.