All soils tested were slightly-to-strongly acidic; dolerite soils
were less acidic than mudstone soils (Tables 3 and 4). All soil
chemistry variables except for Mg varied with treatment and were
lowest in the track and highest in the windrow (Table 3, Figs. 5 and
6). C and N concentrations in the track were 24% and 33% lower
than in the general harvest area, respectively. Electrical conductivity
and pH were 40% and 5% lower in the two firebreak treatments
compared to the general harvest area, while P and Ca were reduced
by 23% and 70%, respectively. By contrast, soils in the windrow
contained 31% more P, 53% more K and had significantly higher
pH than soils in the general harvest area. There was significant
variability between coupes within soil type for all soil chemistry
variables (Table 3).