This feature is available to "Professional" users.
Field Track can analyse the single field's fertiliser nutrient analysis, or all fields currently displayed. Fertiliser analysis is calculated by multiplying the rate by the respective nutrient value on each fertiliser record:
The display grid can also be customised, as well as display figures as per your area conversion factor.
If your General Settings area conversion factor is set to "0.40468564" (the default Hectares to Acres calculation), Field Track will calculate the "Units/Acre" figure and present them in the "Conv" figures.