Podcast Extra: John Kempf on Soil Biophysics, Plant Immunity & Foliars on the Permaculture Orchard Podcast

In this Podcast Extra episode, John Kempf joins Stefan Sobkowiak and his son, Zach, on the Permaculture Orchard Podcast . During the course of the episode, they discuss John's background growing up on an Ohio Amish farm ; plant biophysics, including seeds as living microbial inoculants and quantum mechanics in photosynthesis ; high-ROI grower tips like adding sugar to foliar sprays to cut nutrient…