Table 1.

Differences in average root cross-section, stem basal area, number of roots, and diameter of roots among mulberry and zelkova trees grown in planters, wells and as control trees, 1980-1983^¹

	Root cross-section			Stem basal area			NO. of roots			Diam. of roots
Species and comparison	Diff. (sq in)	P	P_b	Diff. (sq in)	P	P_b	Diff. (nu)	P	P_b	Diff. (in)	P	P_b
Mulberry
Control vs. planter	10.73	⏴.01	⏴.05	28.74	⏴.05	NS	3.00	NS	NS	.42	⏴.05	NS
Control vs. well	11.14	⏴.05	⏴.10	7.64	NS	NS	4.15	⏴.10	NS	.53	.05	NS
Control vs. plant. + well/2	10.94	⏴.01	⏴.05	18.20	NS	NS	3.56	⏴.10	NS	⏴.48	⏴.05	NS
Planter vs. well	.42	NS	NS	-21.10	NS	NS	1.15	NS	NS	⏴.11	NS	NS
Soil amendment vs. no amend	1.72	NS	NS	-0.92	NS	NS	⏴.50	NS	NS	.24	NS	NS
Sidewalk vs. no walk	-1.70	NS	NS	1.96	NS	NS	-1.00	NS	NS	02	NS	NS
Zelkova
Control vs. planter	1.02	⏴.05	NS	4.21	NS	NS	5.02	⏴.05	NS	.17	.10	NS
Control vs. well	.84	⏴.10	NS	1.71	NS	NS	5.02	⏴.05	NS	.10	NS	NS
Control vs. plant. + well/2	.93	⏴.05	NS	2.96	NS	NS	5.02	⏴.05	NS	.14	⏴.10	NS
Planter vs. well	-.18	NS	NS	-2.50	NS	NS	.00	NS	NS	-.07	NS	NS
Soil amendment vs. no amend.	.44	NS	NS	1.47	NS	NS	1.37	NS	NS	-.12	NS	NS
Sidewalk vs. no walk	-.16	NS	NS	-6.92	NS	NS	-.51	NS	NS	-.13	⏴.10	NS

↵1 Probabilities that differences are due to chance rather than treatment are indicated by P for standard t tests and by P_b for the more stringent Bonferroni t tests.