On: What elements does a plant need to grow?

[bravogamma]

Wonderful job and congrats, this looks awesome. Are there any sources (books, papers, websites, etc.) you (or anyone here) can recommend for further reading about the science behind the elements a plant needs to grow?

[lathyrus_long → bravogamma]

"Soilless Culture: Theory and Practice" is a pretty good textbook. I also recommend the USDA's

https://www.fs.usda.gov/treesearch/pubs/46345

That's not about hydroponics, but the theory behind sophisticated growing in containers of soil-like potting mix is almost the same.