Fun facts about soil

1 tablespoon of soil has more organisms in it than there are people on earth
200 to 500 years is how long it takes to make one inch of topsoil
5,000 is the number of different types of bacteria residing in one gram of soil
15 tons of dry soil per acre pass through one earthworm each year
1.4 million earthworms can be found in an acre of cropland
10 percent of the world's carbon dioxide emissions are stored in soil
4,000 gallons of water are needed by soil to produce one bushel of corn
11,000 gallons of water are needed by soil to produce one bushel of wheat

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