The chemical structure of the two composts was analyzed by solid
state 13C NMR (Neutron Magnetic Resonance) and ATR-FTIR (Attenuated
Total Reflectance-Fourier Transformed Infra Red) spectroscopy.
The details about sample preparation and instruments for NMR and
FTIR analysis are described in Mullane et al. (2015). Briefly, for NMR