TABLE 4.

Characteristics of the rate of wood cell development.

Planting year	Sample size	DOY	r-max	r-m	Onset	End	Duration
2012	59	264.7	0.83	0.51	75.2 (4.4)	318 (20.7)	242.8 (24.7)
2006	80	200.4	0.31	0.19	76.6 (7.2)	315.8 (18.7)	239.2 (17.6)
2000	85	229.4	0.65	0.4	77.4 (5.6)	306.2 (21.6)	228.8 (22.5)
1993	89	198.6	0.34	0.21	77.4 (5.4)	298.4 (18.8)	221 (13.8)
1969	91	178.5	0.27	0.17	78.8 (7.4)	290 (22.4)	211.2 (26.2)

The values in brackets are standard deviation.

DOY, represents the day of the year in 2019. r-max, represents the maximal rate of cell production. r-m, represents the average rate of cell production.