Soil Organic Matter Management: The Roles of Residue Quality in C Sequestration and N Supply - Sustainable Management of Soil Organic Matter - page 100

Fig. 3.5. Cumulative and instantaneous 13 CO 2 signatures of decomposing grass (B.humidicola)
and legumes (D. ovalifolium) leaf and root materials.
SOM build up, but the slow initial N release from lignin- and tannin-rich
residues is not compensated by an increased N supply later.
Acknowledgement
We wish to thank Jon Fear for stable isotope analysis.