Table 3 Nested analysis of variance (F and P) with stand nested within stand age for total C, N, and P (Mg ha−1) in the organic layer and the top mineral soil in 8 yr old, 28 yr old and 60 yr old stands of Pinus douglasiana after high-severity fires in central-western Mexico. Stand age is the fixed effects factor; stand is the nested stand effect, within stand age, as random effects factor.
From: Soil Carbon and Nutrient Recovery after High-Severity Wildfire in Mexico
Variation source | ||||
|---|---|---|---|---|
Stand age | Stand nested within stand age | |||
Parameter | F | P | F | P |
Litter layer (LL) | ||||
C | 6.53 | 0.031 | 9.530 | ≤0.001 |
N | 7.24 | 0.025 | 10.49 | ≤0.001 |
P | 8.39 | 0.018 | 15.55 | ≤0.001 |
Duff layer (DL) | ||||
C | 31.3 | 0.001 | 0.962 | 0.477 |
N | 42.7 | ≤0.001 | 0.477 | 0.816 |
P | 24.6 | 0.001 | 0.631 | 0.704 |
Total organic layer (LL + DL) | ||||
C | 34.9 | ≤0.001 | 1.240 | 0.334 |
N | 38.5 | ≤0.001 | 0.762 | 0.609 |
P | 30.1 | 0.001 | 0.802 | 0.581 |
Top mineral soil (0 cm to10 cm) | ||||
C | 4.71 | 0.059 | 1.917 | 0.133 |
N | 2.43 | 0.168 | 1.966 | 0.124 |
P | 1.07 | 0.400 | 14.33 | ≤0.001 |