If you need to review this page at any time, click on overview . Each section is divided into several pages.
Some graphics have a magnifying glass icon in the bottom, right-hand corner.
You can click these to see a larger view in a new window. To close the new window, click anywhere outside it. There are ten formulas used in this tutorial. The first seven are used to determine fertilizer needed based on soil tests and non-fertilizer nitrogen sources. The next calculation is used to compare costs of different types of fertilizer.