Table 5 General linear model analysis for a mixed model nested ANOVA-type design, testing for the effects of forest type and site as fixed factors, and replica as random factor, on physical parameters of Nothofagus forest mineral soils. SD soil density, SM soil moisture, R resistance to penetration.Silt, SM and R were transformed by log(Y) to accomplish assumptions, but not transformed averages are presented in the table. F (p) Fisher statistic with probability in parentheses. Different letters in each column show differences by Tukey test at p < 0.05.
Main factors | Clay (%) | Silt (%) | Sand (%) | SD (g cm−3) | SM (%) | R (Newton cm−2) | |
|---|---|---|---|---|---|---|---|
Forest type | Np | 4.2 | 13.2 | 82.6 | 0.70 | 31.4 | 392.8 |
M | 4.1 | 11.8 | 84.1 | 0.76 | 34.9 | 288.3 | |
Nb | 3.8 | 10.8 | 85.4 | 0.73 | 39.3 | 250.5 | |
Site | COA | 4.8 | 13.6 | 81.6 | 0.75 | 13.4 a | 474.2 b |
MOU | 3.3 | 10.4 | 86.3 | 0.71 | 57.0 b | 146.8 a | |
Tested effects | |||||||
Forest type | F (p) | 0.09 (0.913) | 1.49 (0.329) | 0.67 (0.563) | 0.18 (0.839) | 0.70 (0.548) | 4.42 (0.097) |
Site | F (p) | 4.21 (0.109) | 5.97 (0.071) | 5.64 (0.076) | 0.38 (0.569) | 194.24 (<0.001)* | 100.68 (<0.001*) |
Forest type × Location | F (p) | 0.27 (0.778) | 1.55 (0.317) | 0.47 (0.654) | 0.20 (0.827) | 4.06 (0.109) | 0.50 (0.641) |
Forest type × Replica (Site) | F (p) | 1.17 (0.335) | 1.02 (0.407) | 1.32 (0.277) | 1.18 (0.332) | 0.91 (0.463) | 1.21 (0.319) |