Fig. 1. Representative solution ³¹P nuclear magnetic resonance (NMR) spectra of broiler and turkey litter. The signal at approximately 6.1 ppm is orthophosphate, while the four other strong signals in the ratio 1:2:2:1 represent phytic acid. Both samples contained the greatest proportions of phytic acid for that manure type (Broiler 2 = 61%, Turkey B = 39%).