S timulating U nderstanding of C omputational science through Collaboration, E xploration, E xperiment, and D iscovery for students with Hearing Impairments
a collaboration of the Shodor Education Foundation, Inc. , Eastern North Carolina School for the Deaf, Barton College , the National Technical Institute for the Deaf , and Interpreters, Inc.

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How to Weight a Tree

percentWater

Ratio of dry weight to green weight for selected tree species.

The table shows the average weight for one cord of wood.

The unit of weight is pounds . Use the ratio of dry weight/green weight to calculate the dry weight of a known standing tree.

Species	green weight	dry weight	ratio d/g	percent water
Apple	4850	3888	0.8016	19.84%
Ash	4184	2880	0.6883	31.17%
Basswood	4404	1984	0.4505	54.95%
Birch	4312	2992	0.6939	30.61%
Boxelder	3589	2632	0.7334	26.66%
Buckeye	4210	1984	0.4713	52.87%
Catalpa	4560	2360	0.5175	48.25%
Cherry, black	3696	2928	0.7922	20.78%
Coffeetree	3872	3112	0.8037	19.63%
Cottonwood	4640	2272	0.4897	51.03%
Douglas-fir	3319	2970	0.8948	10.52%
Elm American	4456	2872	0.6445	35.55%
Elm Red	4800	3112	0.6483	35.17%
Elm Siberian	3800	3020	0.7947	20.53%
Fir, Concolor	3585	2104	0.5869	41.31%
Hackberry	3984	3048	0.7651	23.49%
Hickory,Bitternut	5032	3832	0.7615	23.85%
Hickory, Shagbark	5104	3952	0.7743	22.57%
Honeylocust	4640	3832	0.8259	17.41%
Ironwood	4590	4016	0.8749	12.51%
Juniper,Rocky Mt.	3535	3150	0.8911	10.89%
Locust, Black	4616	4016	0.8700	13.00%
Maple, Other	4685	3680	0.7855	21.45%
Maple, Silver	3940	2752	0.6985	30.15%
Mulbery	4712	3712	0.7878	21.22%
Oak, Bur	4960	3768	0.7597	24.03%
Oak, Red	4888	3528	0.7218	27.82%
Oak, White	5573	4200	0.7536	24.64%
Osage-Orange	5120	4728	0.9234	7.66%
Pine, Eastern White	2780	2250	0.8094	19.06%
Pine, Jack	3200	2488	0.7775	22.25%
Pine,Ponderosa	3600	2336	0.6489	35.11%
Redcedar, Eastern	2959	2632	0.8895	11.05%
Spruce	2800	2240	0.8000	20.00%
Walnut, Black	4584	3192	0.6963	30.37%
Willow	4320	2540	0.5880	41.20%

Poplar			0.5988	40.12%
Sweetgum			0.6526	34.74%
Sycamore			0.5769	42.34%

The data in this table except Poplar and Sweetgum comes from the Nebraska Extension office.

Developed by
The Shodor Education Foundation, Inc.

Copyright © 2002 by The Shodor Education Foundation, Inc

This project is supported, in part, by the National Science Foundation

Opinions expressed are those of the authors and not necessarily those of the National Science Foundation.