It may be possible to combine the flush of CO2
following rewetting of dried soil with WEOC:WEON
and develop a potential N mineralization/ immobilization
indicator (Figure 6). Soil organic C:N > 20 reflects
reduced N availability due to greater immobilization of N
[20,21], although the breakpoint can be as high as 30,
depending on the [22]. Using a threshold SOC to SON
value of 20, above which no net N mineralization would
occur, our results indicate N immobilization in 4 of 50
(8%) soil samples, whereas when using WEOC to
WEON, 16 of 50 (30%) soil samples immobilized N
(Figure 6)