Table 2.
Analysis of variance

	Sum square	df	Mean square	F	Significant level
Wood species	1514.30	3	504.76	143.46	0.000
Treatment	452.69	2	226.35	64.33	0.000
Interaction	156.79	6	26.13	7.43	0.000
Error	168.89	48	3.52
Total	11,704.96	60