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Table 1 Some properties of the sample materials used in this study

From: Optimized procedure for the determination of P species in soil by liquid-state 31P-NMR spectroscopy

Materials pH OM TN C TP OP
   (mg g −1 ) (mg g −1 ) (mg g −1 ) (mg g −1 ) (mg g −1 )
Farmland soil 8.82 56 0.56 14.7 0.57 0.17
Farmland soil added with compost 8.87 64 0.68 16.5 0.86 0.23
Forest soil 7.47 83 0.36 10.2 0.72 0.08
Forest litter 6.97 284 4.1 50.3 1.18 0.29
Compost 8.97 522 21.9 206 2.18 0.35
  1. OM, organic matter; TN, total nitrogen; C, elemental carbon; TP, total phosphorus; OP, organic phosphorus.