Table 6 Response surface experimental design optimization model ANOVA.
From: Modeling of sand-cultivated substrate for Gobi facility agriculture and validation of trenching test
Source of variance | Mean-square sum | Degree of freedom | Sum of squares | F-value | P-value |
|---|---|---|---|---|---|
Model | 69.66 | 8 | 8.71 | 127.61 | < 0.0001 |
A—static friction coefficient of soil | 14.34 | 1 | 14.34 | 210.12 | < 0.0001 |
B—rolling coefficient of soil | 7.59 | 1 | 7.59 | 111.17 | < 0.0001 |
C—recovery coefficient of soil | 44.84 | 1 | 44.84 | 657.14 | < 0.0001 |
AB | 1.23 | 1 | 1.23 | 18.06 | 0.0054 |
BC | 0.2652 | 1 | 0.2652 | 3.89 | 0.0961 |
A2 | 0.325 | 1 | 0.325 | 4.76 | 0.0718 |
B2 | 1.04 | 1 | 1.04 | 15.3 | 0.0079 |
C2 | 0.2025 | 1 | 0.2025 | 2.97 | 0.1357 |
Residual | 0.4094 | 6 | 0.0682 | ||
Lack of fit | 0.3578 | 4 | 0.0894 | 3.46 | 0.2365 |
Pure error | 0.0517 | 2 | 0.0258 | ||
Cor total | 70.07 | 14 |
