Soil Characteristics and Lodgepole Pine (Pinus contorta var. latifolia) Performance Two Decades after Disk Trenching of Unburned and Broadcast-Burned Plots in Subboreal British Columbia

Table 6

Average growing degree days, soil moisture tension, and number of days with soil water tension >5 bars in individual treatments¹ for the period of June 1 to September in years 7–9 after planting (1994 to 1996).

	Unburned			Burn
	UB-C	UB-H	UB-T	B-C	B-H	B-T
GDD (5°C)
Year 7 (1994)	810	879	—	817	1007	1006
Year 8 (1995)	—	—	—	809	1022	980
Year 9 (1996)	—	—	—	701	844	855
Average soil moisture tension (bars)
Year 7 (1994)	2.61	11.44	2.86	0.43	8.57	5.43
Year 8 (1995)	0.52	9.17	0.80	—	—	—
Year 9 (1996)	1.57	3.97	3.96	—	—	—
Days with >5 bars soil tension
Year 7 (1994)	0	70	—	17	68	24
Year 8 (1995)	—	—	—	0	60	0
Year 9 (1996)	—	—	—	12	27	24

¹ Refer to Table 1 for treatment abbreviations.