R.J.(Bob) Evans, P.Ag.
Professional Consulting for SMEs and Farmers
 
This dry blend calculator lets you select from common basegrades and batch them according to your requested N, P, K and S.  Enter the required nutrients in the highlighted boxes and watch the application rates change.  If you enter costs for your basegrades then the app will calculate costs per tonne and per acre. 
 
 
The liquid blend calculator does the same calculations using liquid basegrades.  As before, enter the required nutrients in the highlighted boxes and watch the application rates & pounds and gallons change.  If you enter costs for your basegrades then the app will calculate costs per tonne and per acre. 
 
The ammonia calculator uses tank sizes and percentages used to calculate pounds per acre of actual N applied.  It will also convert cost per tonne to cost per pound of N and cost per pound of N to a price per tonne.
 
This one uses fixed and variable costs to come up with some costs per bushel. When we were in business, if I asked some of my farm customers "What does it cost you to produce a bushel of canola" they would respond with "roughly 4 bucks" or "maybe 5 bucks" but a select few would respond "five dollars and forty three cents."  This calculator may help you get started on that process. .
 
This calculator will figure out plant populations per acre, per foot of drill row, per square foot and per square meter.  The populations will be displayed "as seeded" and "as emerged" based on the values that you input.