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Fig. 4. Cumulative erosion (Mg ha–1) during a 30 min simulated rainfall (79 mm) from three soil–cover combinations with 0, 7, 34, and 90 dry Mg ha–1 of biosolids. The analysis was performed on log-transformed cumulative erosion estimates, but the results are presented in back-transformed units. Points with the same level of "soil" labeled with the same letter are not different ({alpha} = 0.05).