Table 3. F values and significance levels for the significant main effects from ANOVA of the total biomass (W), relative shoot weight (% S) and relative root weight (% R), for which there were no sediment effects, and plant height (H), separately for each harvest time interval.

	W	%S	%R	H
	Treatment1			Treatment 1	Sediment 2
15 days	2.66	0.59	0.59	0.18	0.13
30 days	1.73	3.00 *	3.00*	0.98	0.91
45 days	3.89 *	1.52	1.52	3.82*	2.61
60 days	1.21	6.91 ***	6.91 ***	5.71**	1.71
75 days	4.48 **	33.75 ***	33.75***	5.28**	2.88

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.