Table 2.

Mean difference in wind-load reduction between specified pruning types.

Velocity (m/sec)	Velocity (mph)	Pruning comparison^{^z}	Mean wind load reduction difference (N)	P-value
11	25	Lion tailed vs. reduced	−18	0.99
16	35	Lion tailed vs. reduced	10	1.00
20	45	Lion tailed vs. reduced	56	0.06
11	25	Lion tailed vs. thinned	32	0.73
16	35	Lion tailed vs. thinned	62	0.02^*
20	45	Lion tailed vs. thinned	97	< 0.01^*
11	25	Reduced vs. thinned	51	0.11
16	35	Reduced vs. thinned	52	0.09
20	45	Reduced vs. thinned	41	0.37

↵^z Mean difference was calculated by subtracting the wind load reduction of the second pruning type listed in the pruning comparison column from the wind load reduction of the first pruning type. Negative differences indicate that the first listed pruning type did not reduce wind load as much as the second listed pruning type. Reduction in wind load is the difference between wind load before pruning and wind load after pruning.
↵* Highly significant difference between pruning types.