If you don’t mind me asking, what is/was your educational/career route that led you to the knowledge that you currently have? It seems interestingly diverse, like you have biology, agriculture, but also some mechanical?
If you tell me which subject you're trying to learn more about I could recommend something. There's not really any text that covers that field broadly, you might start with a soil science book - I'd recommend Soil Science Simplified as intro or The Nature and Properties of Soils for a complete in depth text. Those won't tell you anything about nursery soils though, only field soil.
I added my email to my profile, feel free to hmu.
I don't have a specific interest at the moment, but have been more curious about this area recently after getting into regen ag podcasts.