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Fig. 1. (a) Degree of P saturation (DPS, Eq. [2]) as a function of Mehlich-1 extractable P for soils of three major physiographic regions of Virginia. *** denotes significant at 0.001 probability level. (b) Log scale plot of DPS (Eq. [2]) as a function of Mehlich-1 extractable P for soils of three major physiographic regions of Virginia.
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