The app version of the Illinois MRTN (Maximum Return to Nitrogen) Rate Calculator has recently been updated with current research values from research conducted under the direction of Dr. Emerson Nafziger and with the on-farm work of Illinois Fertilizer & Chemical Association.
The update also supports new iOS versions and improves usability.
You can download/update the app from the Apple App Store by searching for MRTN Rate Calculator or by clicking this link.
For help in using the app – see these instructions: MRTN Apple App instructions