What is the equal measure of one ton of topsoil in square yards spread
at a depth of 4 inches?

Shayroni --

According to Hoerr Nursery, of Peoria, IL, a ton of topsoil covers
about 300 square feet at a depth of one inch (measures are approximate
because moisture levels in topsoil can vary highly):
Hoerr Nursery
"Grading"
http://www.hoerrnursery.com/GardenInfo/LAWNLawnSeeding.cfm

300 square feet is 33.3 square yards (9 square feet to a square yard).
 To get to 4" of depth, you'd be down to 8.33 square yards.

Best regards,

Omnivorous-GA

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Request for Answer Clarification by shayroni-ga on 22 Jul 2004 11:01 PDT

What about the weight - a ton of topsoil is a weight amount - so
wouldn't the moisture also effect the actual amount of soil?

Thanks

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Clarification of Answer by omnivorous-ga on 22 Jul 2004 11:07 PDT

Shayroni --

Absolutely moisture effects volume (drier soil have more voluminous)
which is why the linked account notes "about 300 square feet" for 1". 
However, Hoerr Nursery is a well-known midwestern landscaper and its
what they use for planning of lawns, berms and all.

In my experience, most landscapers sell their products in cubic yards
-- allowing a better estimate of how much space that mulch or gravel
or topsoil will cover.

The Google search strategy used to get an approximation was:
"one ton of topsoil"

Best regards,

Omnivorous-GA

http://www.mcmedia.com.au/garden/wwwboard/messages/1313.html

maybe that last link did not answer your question

http://www-formal.stanford.edu/jmc/progress/untried.html

http://www.theparkestate.com/phpBB2+viewtopic-t-8-sid-bf8d882af6850f9d1be784488e0426ba.html
125 lbs/ cubic foot.

1 sq yd = 3ft x 3ft = 9 sq ft
9 sq ft x .3 ft = 3 cubic feet for 1 yd at 4 inches = 375 lbs/yd = 5.3 sq yds

Typical topsoil is about 1/2 cubic yard per ton, so 18 inches divded
by 4 = 4.5 square yards. Figure 5 or 6 square yards if the 4 inch
layer is not packed down, meaning has lots of entraped air.   Neil

Super information...thank you very much for your comments...