There's now an app for that, courtesy of TeeJet Technologies of Wheaton, Ill., according to a news release.
Users enter the speed of the rig, tip spacing and target rate. They then select the droplet size category, and the app returns a list of recommended tips.
Users also can enter specific gravit if they're applying liquid fertilizers.
The app supports both U.S. and metric unit, as well as six languages: English, Spanish, French, Portuguese, German and Russian.