Table 5. F values and significance level for the significant main effects from ANOVA of the tap root depth (D) and number of first-order roots (RNO), for which there were significant sediment effects, separately for each harvest time interval.

	D			RNO
	Treatment 1	Sediment 2	Treatment 1 × Sediment 2	Treatment 1	Sediment 2	Treatment 1 × Sediment 2
15 days	28.56 ***	0.00	0.00	60.17 ***	14.63 ***	44.86 ***
30 days	50.60 ***	14.94 ***	8.93 ***	48.58 ***	8.13 **	9.16 ***
45 days	47.34 ***	5.60 *	9.01 ***	14.73 ***	29.25 ***	32.84 ***
60 days	26.67 ***	13.18 ***	0.84	2.96 *	3.70	5.73 **
75 days	61.17 ***	2.42	0.72	30.54 ***	0.52	8.20 ***

Superscripted numbers (1 and 2) indicate the error terms used in model, as follows

¹ Plot (Treatment) with 15 d.f.

² Plot (Treatment) × Sediment with 15 d.f.

* p ≤ 0.05.

** p < 0.01.

*** p ≤ 0.001.