. 2018 Jan 17;121(4):699–709. doi: 10.1093/aob/mcx202

Table 3.

Summary of three-way ANOVA (sum of squares [SS] given as percentage of total SS) showing the effects of fraction (i.e. type) of tissue from adventitious roots (basal zone of root with secondary aerenchyma, mature zone of root, root tip or nodule), two mineral nitrogen (N) concentrations (0 or 11 mm NO₃⁻) and two flooding regimes (drained or waterlogged) on respiration and porosity of Melilotus siculus. Treatments were imposed 28 d after imbibition, for 21 d (plants were 49 d old when measured)

Parameter	Figure where data appear	Main effects				Two-way interaction		Three-way interaction
Parameter	Figure where data appear	Tissue	N	Flooding	Tissue × N	Tissue × flooding	N × flooding	Flooding × N × tissue	Residual
Respiration	4	73.9***	<0.01^ns	2.3*	2.5^ns	2.8^ns	1.3^ns	0.9^ns	16.3
Porosity	5	64.2***	0.1^ns	9.0***	0.6^ns	10.0***	<0.01^ns	1.2^ns	14.8

d.f. = 3 for all factors and interactions except N, flooding and N × flooding, where d.f. = 1; d.f. = 32 for residuals.

*P < 0.05; ***P < 0.001; ns, not significant.