Table 1 Concentration of nitrogen (N), carbon (C) and C/N ratio in the forest floor and mineral soil (0–5 cm) in the three types of stands studied: pure acacia (100A), and eucalypt (100E) and mixed-species (50A50E). Mean values with standard error in brackets are SE

2.50

25.62 (± 2.88)

1.19 (± 0.12)

22.16 (± 2.55)

0.052

492.7

3.83 (± 0.06)

1.10

37.72 (± 1.80)

1.15 (± 0.07)

39.81 (± 3.57)

0.043

877.2

3.65 (± 0.11)

1.25

31.68 (± 2.77)

1.18 (± 0.01)

28.92 (± 3.07)

0.040

792.0

3.80 (± 0.03)

1.47 (± 0.110)

0.11 (± 0.009)

14.2 (± 1.08)

0.011

112.7

1.47 (± 0.11)

1.70 (± 0.136)

0.16 (± 0.017)

11.4 (± 0.74)

0.012

146.6

1.46 (± 0.00)

1.57 (± 0.183)

0.14 (± 0.019)

12.1 (± 1.58)

0.015

102.2

1.46 (± 0.01)