The following information is a Web Extra from the pages of Farm Journal. It corresponds with the article "Zone In On Nitrogen” by Margy Fischer. You can find the article on page 32 in the November 2008 issue.
The following links provide further information about mastering nitrogen efficiency:
These online tools will provide more information on two of the tools used to calculate N needs and loss: ISNT and NDVI and selecting N forms.
The Nitrogen Cycle