Analysing the effect of stand density and site conditions on structure and growth of oak species using Nelder trials along an environmental gradient: experimental design, evaluation methods, and results

Forest Ecosystems

Table 2 Tree characteristics of the trials ING650, GYO651 and SAN653 from the last survey

Trial	Year of last survey	Tree age		d	h	v	cl	csa	cv	i _d	i _h	i _v	i _cl	i _csa	i _cv
Trial	Year of last survey	(yr)		(mm)	(cm)	(dm³)	(cm)	(m²)	(m³)	(mm · yr⁻¹)	(cm · yr⁻¹)	(dm³ · yr⁻¹)	(cm · yr⁻¹)	(m² · yr⁻¹)	(m³ · yr⁻¹)
ING650	2012	6	min	4.0	32.0	0.002	0	0	0	1.0	8.0	0	0	0	0
			mean	17.8	98.4	0.99	58.9	0.11	0.08	4.4	24.6	0.025	14.73	0.027	0.02
			max	38.0	178.0	0.49	143.0	0.66	0.68	9.5	44.5	0.123	35.8	0.165	0.17
GYO651	2013	7	min	5.0	40.0	0.01	17.0	0.0004	0.002	1.3	10.0	0.02	4.3	0.00009	0.0005
			mean	26.7	168.9	0.39	125.6	0.31	0.48	6.7	42.2	0.09	31.4	0.079	0.12
			max	61.0	360.0	2.80	329.0	3.47	11.41	15.3	90.0	0.70	82.3	0.867	2.85
SAN653	2012	4	min	1.0	2.0	0	1.0	0.0005	0.00004	0.5	1.0	0.000	0.50	0.0003	0.00002
			mean	24.3	81.1	0.15	78.9	0.37	0.32	12.2	40.5	0.08	39.5	0.185	0.16
			max	58.00	210.0	1.85	205.0	2.72	3.02	29.0	105.0	0.93	102.5	1.360	1.51

d diameter at root collar, h tree height, v tree volume, cl crown length, csa crown cross section area, cv crown volume, i annual increment since planting, 0 indicates values close to zero