Table 2.

P-values for single degree-of-freedom contrasts comparing the effect of pavement type and profile design on root abundance within root diameter and soil depth classes.

								Soil depth (cm)
		0-5			5-10			10-15			15-20			20-25			25-30
								Root diameter (mm)
Contrast	<2	2-5	>5	<2	2-5	>5	<2	2-5	>5	<2	2-5	>5	<2	2-5	>5	<2	2-5	>5
1. Control versus all other treatments	0.001	0.020	0.995	0.003	0.004	0.994	0.388	0.326	0.046	0.005	<0.001	0.013	0.621	0.895	0.994	0.325	0.995	0.999
2. Main effect (pavement profile design)	0.924	0.155	0.722	0.232	0.632	0.946	<0.001	0.002	0.024	0.006	0.001	0.025	0.475	0.367	1.0	0.084	0.995	0.999
3. Main effect (pavement type)	0.475	0.782	0.503	0.813	0.602	0.523	0.922	0.691	0.305	0.844	0.381	0.426	0.713	0.480	0.994	0.868	0.995	0.999
4. Interaction (pavement profile design × pavement type)	0.117	0.823	0.831	0.046	0.968	0.523	0.005	0.849	0.546	0.086	0.216	0.426	0.404	0.621	1.0	0.568	0.995	0.999