Spreader Calibration
Collect all manure spread on the sheet and place it in the bucket
Weigh bucket and manure and subtract from the dry weight. This will give you the weight of manure applied to the sheet.
Repeat three (3) times and calculate the average weight from the three applications
Application Rate (tons/acre) = weight manure (lbs) x 21.78 sheet length(ft) x width (ft)