How should I determine my target N amount? Bruno Bruzzo August 07, 2018 10:38 Updated Follow You can use the Yara N-Tester to determine the agronomically optimal N-amount for your next application. Related articles What is the minimum and maximum? Why are some application maps not created by the N-Sensor technology? How much does Atfarm cost? Why are these maps outdated? What is the total fertiliser amount? Comments 0 comments Please sign in to leave a comment.