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  1. #1
    Star Lounger
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    how much top soil do I need

    Good Afternoon

    This is not actually a puzzle but seeing how clever you lot seem I thought your logical powers could help me out .

    A part of my garden is 30 foot x 20 foot and slopes down to 10 inches from the highest to lowest point, the slope seems pretty constant, my intention is to level it all off with top soil, given these measurements can the total tonnage of topsoil be calculated?

    Thanks

    Danny

  2. #2
    Plutonium Lounger
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    Re: how much top soil do I need

    The area of your garden is 30 foot x 20 foot = 600 square feet. The average depth of the topsoil will be 5 inches = 5/12 foot. So the volume is 600 x 5/12 = 250 cubic feet. I don't know the exact density of topsoil, but a quick Google results in 1.25 to 1.50 grams/cubic centimeter, corresponding to roughly 78 to 94 lbs/cubic foot. So the total would be in the range of 19500 to 23500 lbs, or 8800 kg to 11000 kg.

  3. #3
    Platinum Lounger
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    Re: how much top soil do I need

    Hi Danny

    A rough estimate of the amount of topsoil required:

    Volume of topsoil required:
    30*20*(10/12)*(1/2) = 250cubic feet of topsoil = 9.26 cubic yards

    Topsoil weighs about 1 ton - 1.25 tons per cubic yard, so depending on the weight of the topsoil approximately 9.25 - 11.5 tons of topsoil required.

  4. #4
    Star Lounger
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    Re: how much top soil do I need

    Thanks both Hans and Tony

    At about

  5. #5
    Plutonium Lounger Leif's Avatar
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    Re: how much top soil do I need

    You should be able to get it for less than 1/3 of that price, but depends on what quality you want/need. Try Googling on "<code>uk topsoil price</code>".

  6. #6
    3 Star Lounger
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    Re: how much top soil do I need

    Maybe you could dig the whole thing down 10 inches?

  7. #7
    Plutonium Lounger
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    Re: how much top soil do I need

    Or dig the top of the hill down 5 inches and use it to fill the bottom?

    StuartR

  8. #8
    Platinum Lounger
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    Re: how much top soil do I need

    You beat me to it Stuart. This is exactly how they build dams on farms - bulldoze a hole and use the earth to build up the wall. No extra soil required.

    Alan

  9. #9
    5 Star Lounger Ruff_Hi's Avatar
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    Re: how much top soil do I need

    Gardens / Lawns etc should actually have a slope of about 2% (drainage) so you only need to fill about 3 or so inches (slope should be about 7.2 inches (30 feet * 12 * .02)

    I did post a garden question in scuttlebut and asked at the time if we needed a garden forum - powers that be said to use another forum but scuttlebut only keeps 60 days worth.
    (Location Australia, then UK, but now USA. Heart, outlook, attitude, etc always Australian)
    Quote: "All Happiness is the release of internal pressure"

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