Fig. 2. (A) Gross N mineralization rates and gross NH₄⁺ consumption rates, and (B) mean residence time of NH₄⁺ pool. Means (bars for standard errors; n = 4) with the same letters (lowercase for gross N mineralization rates and uppercase for gross NH₄⁺ consumption rates) indicate no significant differences across all land use types and locations (One-way ANOVA, Least Significant Difference test at P 0.05).