Fig. 2. Phosphorus K-edge X-ray absorption near edge structure (XANES) spectra of normal corn (NORC), high available phosphorus corn (HAPC), and turkey manure samples. Arrows in the turkey samples point to spectral features consistent with hydroxylapatite. Spectra are offset by 1.0 absorbance units for clearer comparison. NPP, non-phytate phosphorus.