Manure Spreader Calibration Calculator

Application rate from spreader settings and speed.

Load weight (tons)

Distance to empty (ft)

Spread width (ft)

N content (lbs/ton)

P₂O₅ content (lbs/ton)

K₂O content (lbs/ton)

N availability (%)

Target N (lbs/acre)

Tab to move between fields

Application rate (tons/ac)

5.45

Available N (lbs/ac)27.2

P₂O₅ applied (lbs/ac)27.2

K₂O applied (lbs/ac)43.6

Optimal rate for target N (tons/ac)30

Speed adjustment (%)-82

Loads Per Acre For Target N5

How to Use This Calculator

Enter Load Weight (tons), Distance to Empty (ft), and Spread Width (ft) for your spreader configuration.
Enter N, P₂O₅, and K₂O content (lbs/ton) from a manure nutrient analysis.
Set N Availability (%) — surface-applied liquid averages 25–50%, injected 50–75%.
Enter Target N (lbs/acre) for the crop to calculate the optimal application rate.
Read Application Rate (tons/ac), Available N (lbs/ac), and Speed Adjustment (%) — positive means slow down to increase rate.

Ad Placeholder