Table 4.

Fine-root density response to subsurface liquid injection nitrogen fertilizer treatments. There were no significant differences between treatments.

Species	Fertilizer rate (kg N/100 m²)	Sampling distance (m)	Avg. len/Vol (cm/cm³)
Black maple	0	0.6	2.15
	0	1.2	1.79
	0	1.8	1.94
	0.96	0.6	2.90
	0.96	1.2	2.18
	0.96	1.8	2.19
	2.88	0.6	3.52
	2.88	1.2	3.56
	2.88	1.8	2.15
Green ash	0	0.6	2.17
	0	1.2	1.81
	0	1.8	2.03
	0.96	0.6	1.51
	0.96	1.2	3.28
	0.96	1.8	1.54
	2.88	0.6	1.42
	2.88	1.2	2.29
	2.88	1.8	1.40