PRSSS Playing Card Fact Collection
The Pacific Regional Soil Science Society is making a custom deck of playing cards with different fun soil facts on each card. Help us share our love and knowledge of soils by submitting your favourite soil fact!
Every teaspoon of soil has more microorganisms than there are people on earth.
The rate of topsoil formation can vary from <0.25 mm/year in dry and cold environments to 1.5 mm/year in humid and warm environments. Topsoil formation at the rate of 1 mm/year is equivalent to an annual addition of 12 t/ha.
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