A dear friend gave me a copy, but I admit I could not get into it. I gave up when I came to the advice about grinding up a quartz crystal, sprinkling it into a bucket of water and then stirring clockwise ... I forget whether they suggested incense and chanting. But allegedly the silicon dioxide quartz (and stirring) was going to promote soil fertility.
The funny thing is that I AM rather into chanting and crystals (and dancing around a fire when my legs and ankles were stronger), but when they suggest those in the same tone as mulching and drainage and fertilization, I'm NOT into the crossover.
There are already plenty of traditional rituals to increase soil fertility!
For some reason I want to keep practical science in one box, and mystical spirituality in another box ... but I don't like confusing them with each other. That might be self--contradictory, or dualist, or something else I would disapprove of if I were being consistent, but I just want to know whether a piece of advice is fact-based (this-world observational, repeatable) or fanciful (inspired, symbolic, spiritual).