Imagine learning about soil while playing cards…

The PRSSS is creating a custom card deck with soil facts. Contribute your favourite soil facts here!

Your submission enters you into a draw for a free card deck!

The deadline for contributions is Monday January 20th, 2020.

Example facts:

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.

Note: if you find your fact from a source (e.g. journal article, textbook, website), please rephrase it in your own words!