Modelling the variation in wood density of New Zealand-grown Douglas-fir

New Zealand Journal of Forestry Science

Table 1 Summary of the different sources of wood density data collected for New Zealand-grown Douglas-fir

Region	Outerwood density				Pith-to-bark densitometry profiles					Felled tree data
	No. of stands	Age (years)			No. of stands	No. of trees	Age (years)			No. of stands	No. of trees	Age (years)
	No. of stands	Mean	Min	Max	No. of stands	No. of trees	Mean	Min	Max	No. of stands	No. of trees	Mean	Min	Max
North Island
Bay of Plenty	135	44	16	70	10	122	35	20	52	9	61	37	31	62
Waikato	40	33	25	59	3	25	57	52	59	3	57	58	54	59
Other North Island	7	38	29	52	2	20	47	42	52	0	0	-	-	-
South Island
Tasman/Nelson	44	34	17	54	3	30	37	28	52	1	1	24	24	24
Canterbury	50	35	15	62	18	156	36	18	62	2	11	46	27	48
Otago	14	31	16	52	11	162	26	14	40	2	3	45	44	46
Southland	22	35	24	57	0	0	-	-	-	4	39	49	40	67
Overall	312	39	15	70	47	515	35	14	62	21	172	48	24	67