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Fig. 4. Contact angle (CA) related to A/B ratio in Fourier transform-infrared spectra of bulk soil for samples from Chorin, Steigerwald, and Waldstein profiles.
CA = 31.1 + 334.1 x (A/B) 476.3 x (A/B)2; r2 = 0.62; samples C/Bw, Bsh, and E/Ah are not included in the regression.
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