Fig. 3. Relationships between the number of replications and the difference in total soil C (%) between the treatments that can be detected as statistically significant via F-test for treatment effects with power of 0.80 and of 0.05 using standard randomized complete block design (RCBD) analysis and random field analysis with correlated errors based on plot data (SA1) analysis with spatial correlation ranges of 15, 25, and 35 m.