Fig. 2
Example spectra from cropping systems from various locations, showing details of the orthophosphate monoester region. 1 barley/corn, no till, Prince Edward Island, Canada [33]; 2 corn, France; 3 corn/soybean, no till, Quebec, Canada [32]; 4 Rice, China. Samples 2 and 4 are unpublished spectra. Mono general orthophosphate monoester regions; α-G α-glycerophosphate; βG β-glycerophosphate; C d-chiro inositol hexaphosphate (IHP); g1P glucose 1-phosphate; g6P glucose 6-phosphate; M myo-IHP; N neo-IHP; n nucleotides; S scyllo-IHP. Spectra were analyzed without proton decoupling, processed with 2 Hz line-broadening, and are scaled to the height of the tallest non-orthophosphate peak shown in all spectra