[USCC] Conversions for bulk density and related compost measurements

[Steve Diver]

As a follow-up to Ron Alexander's question on converting 
bulk density from US units (lbs/CY) to mg/l.... 

Here are some handy conversions for compost measurements,
from "Interim Guidelines for Compost Quality" published
by Washington State Department of Ecology in 1994. 

Regards,
 
Steve Diver
Central Texas
steved at ipa.net

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Interim Guidelines for Compost Quality
Washington State Department of Ecology, 
Pub 94-38, November 1994
http://www.p2pays.org/ref/14/13257.pdf
_____ 84-page PDF


page 42
"Compost has an average dry weight bulk density of 0.25 g/cm3"

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C. Converting Densities and the Recommended Application Rate into Other Units

Bulk Density Conversions 		Example of Each
lb/ft3 x 0.016 = g/cm3 		20 lb/ft3 x 0.016 = 0.32 g/cm3


lb/yd3 x 0.000593 = g/cm3 		1000 lb/yd3 x 0.000593 = 0.59 g/cm3


kg/m3 x 0.001 = g/cm3 		250 kg/m3 x 0.001 = 0.25 g/cm3


g/cm3 x 62.43 = lb/ft3 		0.30 g/cm3 x 62.43 = 18.7 lb/ft3


g/cm3 x 1685.6 = lb/yd3 		0.30 g/cm3 x 1685.6 = 506 lb/yd3


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"The processor may wish to express the application rate in terms 
of wet weight per unit area, or in terms of volume. These are 
relatively simple calculations and require minimal information 
about the physical parameters of the compost product, e.g. percent 
solids (or percent moisture), and bulk density. The following 
conversions are presented to assist processors and JHDs in 
converting to other units."

See the following calculations 

1. Wet Weight and Dry Weight Conversions
2. Wet MT to Inches
3. Wet MT/ha to Cubic Yards (yd3)
4. Wet MT/ha to Pounds per Square Foot (lb/ft2)
5. Wet MT/ha to Short Tons per Acre (tons/acre)

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