Chart1
Figure 3. Comparisons of iron strip phosphorus (FeO-Pw) in RO and RO/Tap runoff waters versus Olsen-P (Pi), water soluble soil-P (Pws), and iron strip (FeO-Ps) soil phosphorus tests. Regressions do not differ among RO and RO/Tap waters, except intercepts differ between RO and RO/Tap runoff waters for Pi. All regressions are significant (P = 0.05).

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