Study on Compaction of Reclaimed Soil of Nonmetallic Mining Area in Northern Foothills of Tianshan Mountains in Xinjiang, China

Table 5

Tests of between-subject effects.

Source	Type III sum of squares	df	Mean square	F	Significance
Corrected model	27.234	9	3.026	6.393	0.000
Intercept	0.198	1	0.198	0.419	0.521
Soil thickness compaction times	27.234	9	3.026	6.393	0.000 < 0.05
Error	17.988	38	0.473
Total	45.222	48
Corrected total	45.222	47

Note. R² = 0.602 (adjust R² = 0.508). Dependent variable: porosity.