Ok, got it
Before you start you’ll need a few things so that we can get the calculation right...
The location and size of your field
Thousand grain weight (if you have it, otherwise use typical values for the crop)
Germination (if you have it, otherwise use typical values for the crop)
The calculation will provide you with a result for your field which can be saved for future reference. We will retain some of the information for statistical research, but personal information will not be shared with any third parties.