Broke my hiatus once more; I had inspiration. 

Also, I showed my work as regards scientific stuff this time (And by that, I showed everyone how Archibald's R&D works, as well as the processes behind it).

And here is the IRL basis:

http://www.imedpub.com/articles/production-of-natural-insecticide-from-neem-leaves-azadirachta-indica.pdf

http://www.discoverneem.com/growing-neem-trees.html

http://npic.orst.edu/factsheets/neemgen.html

https://www.thespruce.com/using-neem-oil-as-an-organic-insecticide-2132579

http://www.zacsarian.com/whats-new-durabloom-bio-organic-liquid-fertilizer/

http://bic.searca.org/site/tag/durabloom-bio-organic-fertilizer/

All IRL inventions/discoveries viable with 1950s' technology.