Elaine Ingham. 2019. The Profits In Your Soil: Reaching New Levels of Fertility on Farms, Pastures, and Special Crops. Video. Sustainable Design Masterclass. Retrieved from youtube.com/watch?v=gbGrxoJO2zY.
From the video's description, “In this hour webinar, Elaine Ingham shows why soil biology can increase fertility, boost succession, and allow you to grow more of ANY plant species while drastically cutting inputs”. Ca. 3 hours, 10 minutes long.