Table 2. Mean height growth (cm) of 10 tree species grown with and without shelters for 3 years.

Treatment	Treatment/year
	1993		1994		1995
	Sheltered	Nonshellered	Sheltered	Nonsheltered	Sheltered	Nonsheltered	Shelter removed
Sawtooth oak	105.60 a^{^z}	35.67 b	186.10 a	92.55 b	235.78 a	171.64 b	199.00 a
Green ash	123.58 a	68.79 b	164.67 a	127.98 b	190.67 a	167.55 b	208.46 a
White oak	77.90 a	47.30 b	172.64 a	96.19 b	180.17 a	114.75 b	184.75 a
Flowering dogwood	81.79 a	68.40 a	136.26 a	101.88 b	137.75 a	112.60 a	102.88 a
Nuttall oak	95.59 a	41.90 b	178.29 a	77.82 b	200.00 a	107.71 b	204.89 a
Chinese elm	143.56 a	113.64 b	237.29 a	197.29 b	241.86 a	204.38 a	219.67 a
Eastern redbud	92.58 a	37.32 b	161.00 a	83.46 b	166.80 a	100.38 b	161.67 a
Swamp chestnut oak	82.02 a	41.46 b	166.56 a	71.88 b	181.54 a	92.83 b	178.91 a
Northern red oak	105.89 a	76.14 b	148.15 a	88.74 b	171.46 a	115.08b	197.82 a
Florida maple	60.27 a	46.12 a	111.76 a	85.13 a	138.30 a	111.44a	102.67 a
Overall height growth	98.13 a	63.67 b	167.79 a	110.88b	188.41 a	138.12b	181.24 a

↵z Treatment means in each year followed by the same letter are not significantly different (paired t-test) at P 0.05. Katsura tr ee was not measured due to low survival percentage.