Table 3. Soil physical properties at three different depths in the urban tree pits treated with bare soil (CK), cobblestones (CB), water permeable bricks (WPB), pine barks (PB), green waste compost (GWC) and turf grass (TG) two-years after mulching.

Depth	Treatment	Bulk density (g.cm-3)	Total porosity (%)	Macroporosity (%)	Microporosity (%)
0–10 cm	CK	1.47±0.13ab	44.28±1.72b	36.47±1.54bc	7.81±0.38bc
	CB	1.51±0.03a	45.13±1.16b	35.97±1.18bc	9.16±0.30ab
	WPB	1.55±0.06a	40.64±1.29c	33.46±0.70c	7.18±0.65c
	PB	1.39±0.03ab	47.21±1.25ab	37.84±2.37ab	9.37±1.41ab
	GWC	1.34±0.04a	49.96±1.22a	39.67±1.63ab	10.29±0.45a
	TG	1.39±0.07ab	48.31±1.81a	40.96±2.26a	7.35±0.45c
10–20 cm	CK	1.52±0.05a	43.64±1.10bc	35.41±1.14b	8.23±0.34a
	CB	1.48±0.03ab	43.71±1.09bc	36.77±1.52ab	6.94±0.70a
	WPB	1.55±0.06a	41.27±1.76c	35.09±1.04b	6.18±1.64a
	PB	1.42±0.03bc	44.54±1.47bc	37.69±2.22ab	6.85±2.51a
	GWC	1.36±0.07c	48.72±1.87a	40.06±1.13a	8.66±0.78a
	TG	1.42±0.05bc	46.80±2.39ab	37.86±2.45ab	8.94±0.45a
20–40 cm	CK	1.50±0.09a	41.92±0.83a	35.02±1.02a	6.90±0.35a
	CB	1.52±0.03a	42.98±1.14a	35.84±1.83a	7.14±0.72a
	WPB	1.51±0.04a	41.76±1.87a	35.25±1.39a	6.51±0.85a
	PB	1.54±0.07a	42.76±1.15a	35.24±1.13a	7.52±0.60a
	GWC	1.55±0.07a	41.69±1.51a	35.18±1.24a	6.51±0.48a
	TG	1.53±0.07a	43.40±1.93a	35.98±1.50a	7.42±0.68a

Values with different letters in the same column indicate significant differences between treatments (p<0.05, n = 3). Data are means ± standard deviation.