Table 2.

Mean volume (m³/ha⁻¹) of tree stem and branch sections 20 cm (8 in) or greater in diameter in urban areas of SE lower Michigan by species-product class and wood products grade.^{^z}

Spp-product class	Main stem grade						Crown	Total volume	Total grade (1-5)	% Crown wood
Spp-product class	0	1	2	3	4	5	Crown	Total volume	Total grade (1-5)	% Crown wood
Softwoods
Spruce-fir	0.3177	—	0.0021	0.2831	—	—	—	0.6029	0.2852	0.00%
White-red pine	0.1619	—	0.0035	0.1128	—	—	0.0032	0.2812	0.1162	1.13%
Other pine	0.1218	0.0079	0.0193	0.0173	—	—	0.0012	0.1675	0.0445	0.74%
Other softwoods	0.0046	—	—	0.0389	—	—	0.0002	0.0437	0.0389	0.44%
Douglas-fir	0.0025	—	—	0.0040	—	—	—	0.0065	0.0040	0.00%
All softwoods	0.6084	0.0079	0.0249	0.4560	—	—	0.0046	1.1018	0.4887	0.42%
Hardwoods
Soft maple	1.0385	0.0032	0.0737	0.0918	0.0069	0.8172	0.4131	2.4444	0.9928	16.90%
Poplar	0.0951	0.2366	0.1398	0.2550	0.0034	0.0390	0.0586	0.8275	0.6738	7.08%
Red oak	0.0070	0.0309	0.1040	0.2458	0.0210	0.2405	—	0.6494	0.6423	0.00%
Ash	0.0718	0.0924	0.0853	0.0203	0.0164	0.2527	0.0162	0.5550	0.4670	2.92%
Other soft hardwoods	0.1844	0.0179	—	0.1010	0.0229	0.2421	0.0505	0.6188	0.3839	8.16%
White oak	0.0130	0.0181	0.0130	0.1157	0.0352	0.1037	0.0596	0.3583	0.2856	16.65%
Hickory	0.0555	—	0.0017	0.0956	0.0371	0.0308	0.0152	0.2359	0.1652	6.44%
Walnut	0.0016	0.0248	0.0747	0.0254	—	0.0329	0.0037	0.1632	0.1578	2.26%
Other hard hardwoods	0.0810	0.0050	0.0088	0.0333	0.0101	0.0928	0.0424	0.2735	0.1501	15.52%
Hard maple	0.2082	0.0013	0.0175	0.0376	0.0184	0.0622	0.0142	0.3594	0.1370	3.96%
Basswood	0.0399	0.0142	0.0197	0.0019	—	0.0657	0.0209	0.1624	0.1016	12.88%
Birch	0.0064	—	—	—	—	0.0622	0.0024	0.0710	0.0622	3.34%
Yellow poplar	—	—	—	0.0001	—	—	—	0.0001	0.0001	0.00%
All hardwoods	1.8025	0.4444	0.5383	1.0235	0.1715	2.0418	0.6969	6.7189	4.2195	10.37%
Noncommercial	0.0633	—	0.0089	0.0056	—	0.0094	0.0116	0.0989	0.0239	11.75%
All spp-product classes	2.4742	0.4523	0.5721	1.4851	0.1715	2.0512	0.7131	7.9196	4.7322	9.00%

↵^zCrown logs were not graded.
Dashes indicate no trees of this type were found during sampling.