- Posted January 2, 2013 by
Fond du Lac, Wisconsin
This iReport is part of an assignment:
Impact Your World
BOB POSTHUMA AND Soil ingredients
Healthy soil is made of 45% Parent Material (sand, silt, clay), 25% pore space, 25% water, and 5% (the most important part of healthy soil) organic material.
GEOTEA documentary is a Living Web Films production.