Table 5.
Working hours for each street tree management item

Street tree pruning		Unit	Quantity (diameter at breast height cm), per tree
			11 less	11-21 less	21-31 less	31-41 less	41-51 less	51 or more
Heavy pruning	Working time	min	6.3	12.4	15.6	22.4	32.4	42.3
	Work preparation time	min	12.2	12.2	12.2	12.2	12.2	12.2
	Travel time	min	1.8	1.8	1.8	1.8	1.8	1.8
	Workload per hour	week	2.96	2.27	2.03	1.65	1.29	1.07
	Daily workload	week	23.65	18.18	16.22	13.19	10.34	8.53
Light pruning	Working time	min	11.3	16.7	21.4	29.4	38.9	57.4
	Work preparation time	min	12.2	12.2	12.2	12.2	12.2	12.2
	Travel time	min	1.8	1.8	1.8	1.8	1.8	1.8
	Workload per hour	week	2.37	1.95	1.69	1.38	1.13	0.84
	Daily workload	week	18.97	15.64	13.56	11.06	9.07	6.72
Shrub pruning		Unit	Obstacle area, per 10m2 of planting area
			Less 0.9m			0.9m or more
Working time		min	3.4			5.8
Work preparation time		min	2.4			2.4
Travel time		min	0.03			0.03
Workload per hour		m2	102.92			72.90
Daily workload		m2	823.33			583.23
Watering of water sprinkler truck		Unit	Water tank (water sprinkler truck), per 1.5m2 of planting area
			1,800L		3,800L		5,500-6,500L
Working time		min	3.7		2.5		1.7
Work preparation time		min	1.4		1.4		1.4
Travel time		min	1.2		1.2		1.2
Workload per hour		m2	142.86		176.47		209.30
Daily workload		m2	1,142.86		1,411.76		1,674.42
Weeding		Unit	Obstacle area, per 1.5m2
Working time		min	6.1
Work preparation time		min	5.6
Travel time		min	0.03
Workload per hour		m2	51.15
Daily workload		m2	409.21
Tree fertilization		Unit	Quantity (diameter of root / unit: cm), per 1 week
			11 less	11-21 less	21-31 less	31-41 less	41-51 less	51 or more
Working time		min	5.1	5.8	6.7	8.2	9.3	11.6
Work preparation time		min	1.3	1.3	1.5	1.5	1.7	1.7
Travel time		min	0.03	0.03	0.03	0.03	0.03	0.03
Workload per hour		m2	9.33	8.42	7.29	6.17	5.44	4.50
Daily workload		m2	74.65	67.32	58.32	49.33	43.52	36.01
Shrub fertilization		Unit	Obstacle area, per 1m2 of planting area
Working time		min	9.4
Work preparation time		Min	2.1
Travel time		min	0.03
Workload per hour		m2	52.04
Daily workload		m2	416.31
Chemical spraying (machine)		Unit	Obstacle area, chemical spraying amount per 1,000ℓ
Working time		min	73.5
Work preparation time		min	42.3
Travel time		min	73.5
Workload per hour		per vehicle	1.06
Daily workload		per vehicle	8.45
Windbreak wall installation		Unit	Quantity (tree height), per 10m
			H = 0.45m			H = 0.9m
Working time		min	4.6			6.4
Work preparation time		min	3.3			4.2
Travel time		min	0.03			0.03
Workload per hour		m2	7.57			5.64
Daily workload		m2	60.53			45.16