There was no significant difference (p > 0.01) between the treatments in the Topehaehae 15N fluxes from 0.2 to 0.4 m depth as the NoC fluxes varied substantially between replicates. This indicates that denitrification might occur in micro-sites within this sample, and that resident organic CGH 2466 was not uniformly distributed.
Contrary to the work of Clague et al. (2013), who found a significant (p < 0.001) correlation between the extractable dissolved organic C and the total 15N flux produced, no clear relationships were found in this study between the total 15N flux and the CW extractable C, HW extractable C or total C concentrations (Fig. 4). However, others (Hill and Cardaci, 2004 and Jahangir et al., 2012) have also found only weak relationships between CW extractable C and denitrification potential, reflecting the influence of small scale, highly variable factors such as urine deposition (Ghani et al., 2003) or fragments of relict C on the CW extractable C content.