A retiree in Portland taught me more about soil in 10 minutes than 2 semesters of class
I was at a plant swap in Portland last spring and this 70 year old guy kept squeezing my tomato seedlings' root balls, which annoyed me at first. He pointed at the yellow leaves and said 'your dirt is dead, kid' and handed me a jar of worm castings from his garage. Now I test my soil every 6 weeks and my peppers actually fruit, so what am I missing by skipping the cheap stuff?
Ever notice how the folks who fix things with their hands always have the best shortcuts? Same thing happens at my barber, my mechanic, and this old guy down the street who fixes bikes out of his garage. Turns out the cheap tricks usually work because someone spent 40 years learning what actually matters.