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Fig. 3. Concentration of phosphorus determined after bicarbonate–dithionite extraction, filtration, and digestion of the filtrate (BD-Pt) as related to total phosphorus (TP) concentration in the 10 runoff samples studied; mean of 5 replications; the error bars represent 95% confidence intervals. The line represents the BD-Pt concentration as predicted from the equation in Fig. 2 (redox-sensitive particulate phosphorus [BD-PP] was calculated from the particulate phosphorus concentration and added to the measured total dissolved phosphorus [TDP] to give BD-Pt).
