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Worksheet 1: Drill Spreader Calibration Calculation

Calculations to measure the actual application rate:

 

43,560 ft2/acre x ___ B (lbs) ÷ ____ C (rev) ÷ ____D (ft) ÷ _____ E (ft) = __A (lbs/acre)

 

10,000 m2/ha x ___B (kg) ÷ ___C (rev) ÷ ____ D (m) ÷ _____E (m) = ______ A (kg/ha)

 

= application rate (lbs/acre or kg/ha)

= weight of fertilizer (lbs or kg) collected from applicator(s) one row during (C) revolutions

= number of revolutions of the drive wheel

= “actual” drive wheel circumference (ft or m)

= row spacing (ft or m).

 

Next: Worksheet 2: Drill Spreader Calibration Calculation

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