Revision history [back]

I can point you to a few sources: Echonet.org has a good technical resource library - https://www.echocommunity.org/en/search?q=irrigation

Echo references Chapin folks, it appears are now at - https://www.jainsusa.com/_literature_149032/Chapin

And don't forget - https://practicalaction.org/irrigation, and https://ilssi.tamu.edu/,

These should get you started.