Seasonal variations of auxin and gibberellin A4 levels in cambial-region tissues of three conifers (Pinus elliottii, Chamaecyparis obtusa, and Cryptomeria japonica) with inherently different wood densities

Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 1 Sample trees

Species	No.	Age	H	DBH	H/D ratio	Wood density
Species	No.	Age	(m)	(cm)	(%)	(kg/m³)
Sugi (Cryptomeria japonica)	1	33	16.0	22.6	70.8	303
	2		15.7	22.1	70.9	298
	3		14.8	18.5	80.1	375
	4		16.4	22.9	71.5	303
Hinoki (Chamaecyparis obtusa)	1	33	12.1	15.6	77.5	429
	2		12.6	13.7	92.0	433
	3		11.6	13.4	86.7	394
	4		11.5	12.1	95.0	406
Slash pine (Pinus elliottii)	1	57	22.2	44.9	49.4	543
	2		26.1	59.9	43.6	523
	3		23.0	35.0	65.7	555
	4		27.7	50.0	55.4	475

H tree height, DBH diameter at breast height, H/D ratio height-to-diameter ratio
The wood density was measured on the samples with 2–4 outer rings (including the current rings being formed in 2011)