Modelling variation in wood density within and among trees in stands of New Zealand-grown radiata pine

New Zealand Journal of Forestry Science

Table 1 Summary of the different wood density datasets that were used to develop the various models

	Five-ring density samples at breast-height					Disc-level data collected on felled trees					Ring-level densitometry data at breast-height
Region	Number of sites	Number of trees	Age (years)			Number of sites	Number of trees	Age (years)			Number of sites	Number of trees	Age (years)
			Min.	Max.	Mean			Min	Max	Mean			Min.	Max.	Mean
Auckland	50	1592	16	57	32	30	312	14	53	31	4	66	19	33	26
Rotorua	94	2265	10	64	24	117	1264	6	56	25	7	172	17	35	24
Wellington	42	1256	19	53	30	10	63	20	32	26	3	26	25	25	25
Nelson	60	1759	14	56	29	28	220	13	45	27	4	37	25	33	27
Westland	10	234	14	48	23	5	25	28	47	33	–	–	–	–	–
Canterbury	40	1232	14	74	31	8	54	16	30	25	3	29	25	25	25
Southland	40	1181	15	54	30	21	174	14	39	27	4	45	21	25	24
Overall	336	9519	10	74	29	219	2112	6	56	26	25	375	17	35	25