Table 2. Summary of measurements...

Table 2.

Summary of measurements (mean±standard error of mean) for both grass and willow

Age: weeks	Infiltration rate: m/s	Root depth: mm	Root biomass: g	Root length density: cm/cm³
Grass
2	1·96 × 10⁻⁶ ± 3·25 × 10⁻⁷a	173 ± 0	0·012 ± 0·001a	0·82 ± 0·22a
4	6·39 × 10⁻⁶ ± 1·42 × 10⁻⁶ab	367 ± 1	0·065 ± 0·005b	2·19 ± 0·22a
6	7·93 × 10⁻⁶ ± 1·64 × 10⁻⁶ab	450 ± 2	0·338 ± 0·010c	5·64 ± 0·86b
8	1·37 × 10⁻⁵ ± 2·16 × 10⁻⁶b	450 ± 3	0·461 ± 0·025c	7·14 ± 0·64b
Willow
2	5·21 × 10⁻⁶ ± 2·34 × 10⁻⁹a	256 ± 16	0·075 ± 0·005a	2·42 ± 0·80a
4	1·04 × 10⁻⁵ ± 1·50 × 10⁻⁶b	450 ± 0	0·154 ± 0·014b	3·00 ± 0·67ab
6	1·81 × 10⁻⁵ ± 1·30 × 10⁻⁶c	450 ± 0	0·352 ± 0·022c	4·46 ± 0·18ab
8	2·65 × 10⁻⁵ ± 7·35 × 10⁻⁷d	450 ± 0	0·552 ± 0·035d	5·33 ± 0·05b

Age: weeks	Infiltration rate: m/s	Root depth: mm	Root biomass: g	Root length density: cm/cm³
Grass
2	1·96 × 10⁻⁶ ± 3·25 × 10⁻⁷a	173 ± 0	0·012 ± 0·001a	0·82 ± 0·22a
4	6·39 × 10⁻⁶ ± 1·42 × 10⁻⁶ab	367 ± 1	0·065 ± 0·005b	2·19 ± 0·22a
6	7·93 × 10⁻⁶ ± 1·64 × 10⁻⁶ab	450 ± 2	0·338 ± 0·010c	5·64 ± 0·86b
8	1·37 × 10⁻⁵ ± 2·16 × 10⁻⁶b	450 ± 3	0·461 ± 0·025c	7·14 ± 0·64b
Willow
2	5·21 × 10⁻⁶ ± 2·34 × 10⁻⁹a	256 ± 16	0·075 ± 0·005a	2·42 ± 0·80a
4	1·04 × 10⁻⁵ ± 1·50 × 10⁻⁶b	450 ± 0	0·154 ± 0·014b	3·00 ± 0·67ab
6	1·81 × 10⁻⁵ ± 1·30 × 10⁻⁶c	450 ± 0	0·352 ± 0·022c	4·46 ± 0·18ab
8	2·65 × 10⁻⁵ ± 7·35 × 10⁻⁷d	450 ± 0	0·552 ± 0·035d	5·33 ± 0·05b

Note: Letters indicate significant differences as tested using one-way Anova followed by post hoc Tukey's test (root biomass data for both species and infiltration rate data for willow were square root transformed in statistical analysis). Note that root depth was constrained to a maximum of 450 mm, due to column dimensions

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