Table 1.

Period (days)	width of xylem (μm)			Climate		Pearson correlation (r)
						X1Y1		X1Y2		X2Y1		X2Y2		X3Y1		X3Y2
	X1	X2	X3	Y1	Y2	r	p-value	r	p-value	r	p-value	r	p-value	r	p-value	r	p-value
A (30)	212.05	248.71	218.32	159	28.8	-0.666*	0.018	-0.053	0.869	-0.650*	0.022	-0.024	0.942	-0.661*	0.019	-0.030	0.926
B (60)	470.33	601.04	502.34	158	28.5
C (90)	1,131.33	1,057.00	1,152.32	100.71	28.3
D (120)	1,185.08	1,077.72	1,232.15	122.9	28.2
E (150)	1,974.54	1,326.43	1,633.43	97.8	27.8
F (180)	2,809.89	2,901.55	2,700.56	74.4	27.7
G (210)	3,045.67	3,005.18	3,021.34	166.8	26.8
H (240)	3,182.65	3,191.71	3,188.22	21.7	27.3
I (270)	3,226.47	3,212.44	3,204.45	115.2	27.2
J (300)	3,252.78	3,270.98	3,318.23	69.1	29.2
K (330)	3,572.95	3,564.77	3,498.34	60.1	29.3
L (360)	4,106.2	4,124.35	4,150.11	48.9	29.2
Total number	28,169.94	27,581.88	27,819.81	1,194.61	338.3
Average	2,347.50	2,298.49	2,318.32	99.55	28.19
SD	1,301.71	4,124.35	1,301.96	46.72	0.84

XI: tree 1; X2: tree 2; X3: tree 3 (tree spacing or planting distance of 3 m x 3 m); Yl: rainfall (mm); Y2: temperature (°C); width of xylem (XI, X2, and X3 > 2 cm per year).
Correlation is significant at the 0.05 level.