SOIL: IT'S NOT DIRT
As kids we used dirt for play – ‘mud burgers’ anyone? – and parents demanded that we wipe our feet and wash our dirty hands when we came inside the house. But soil is not dirty! In fact, soil contains an entire universe of organisms – one gram of soil contains billions of bacteria, thousands of fungi and algae. In addition to the billions of organisms, soil is also a mixture of living and non-living materials. The non-living materials include rock particles that have weathered over thousands of years from the bedrock below, plant residues and dead microbes.