three subsequent sampling times because of the differences in the experimental designs. Since OR*N fertilizer interactions were frequently observed, data are presented to reflect these interactions. For samples taken at two, five and eight months after installation, there were no significant OR*time, N fertilizer*time, nor OR*N fertilizer*time interactions (p > 0.05) for SOC and N in the whole soil and aggregate fractions and thus mean values for the three sampling times are presented for the different treatments. Additionally, because the sampling time factor was frequently significant, mean values for each sampling time pooled across treatments are also presented to illustrate the differences between sampling times.