Week 3 - Soil
"Soil is the largest, most diverse, and complex life system known to science. It is less understood than space. Only recently has science been able to tackle the science of soil. Healthy soil makes for healthy plants. Healthy plants provide clean water, clean air and abundant food. Organic carbon is the foundation for all the structure of the life in our ecosystems, but plants and animals also need a proper balance of nutrients available in the soil. Having a large diversity of organic matter in the soil provides all the nutrients needed."
-Matt Powers, The Permaculture Student 1