Mean root mass density (RMD, kg m-3) for the two willow treatments (pollarded once (IP) and repollarded (RP)) 1 year following repollarding for the different depths and diameter classes, separated by root diameter class and soil depth, and expressed as a % of the unpollarded treatment.

Table 3: Mean root mass density (RMD, kg m-3) for the two willow treatments (pollarded once (IP) and repollarded (RP)) 1 year following repollarding for the different depths and diameter classes, separated by root diameter class and soil depth, and expressed as a % of the unpollarded treatment.

Treatment	Depth mm	Root diameter class mm
		< 1	1 < 2	2 < 5	5 < 10	> 10	All
		Root Mass Density as a % of the unpollarded treatment
IP	0-150	90	93	65^*	95	134	105
	150-300	138	107	185	288 (^*)	166	181
	300-450	132 (^*)	83	128	75	28	45
	450-600	91	89	28	116	234	157
	0-600	99	94	82	107	114	105
RP	0-150	33^*	63 (^*)	65^*	47	184	105
	150-300	73	93	105	61	612 (^*)	216
	300-450	69 (^*)	81	114	27	106	98
	450-600	66	67	54	0	13	19
	0-600	42^*	70	73	40	161	103

Significant (P < 0.05) differences from the UP value marked with an asterisk; near-significant differences marked with a (*).