FBNSM has revolutionary information on how Nitrogen impacts yield for individual seed varieties. You can understand how a variety has performed at different nitrogen application rates, and filter the information you see for factors such as crop rotation and soil texture to understand how those variables, along with nitrogen, impact yield.
To Access FBN nitrogen analytics:
1) Go to the Seed Finder
2) Click on a variety you would like to analyze, for example PIONEER 11-51.
3) Now you are on the Seed Intelligence page for this variety. Make sure you have the "Nitrogen" analysis selected on the left side. Select filters on the top to see how different factors may influence yield at different rates of nitrogen addition.