This calculator is designed to assess the performance of placement machines such as planters or side-dressers which lay or place bands of fertiliser on or in the ground. See also our Fertiliser Spreader Calibration tool for machines that spread fertiliser by throwing.
This version of FertSpread does not store your data or keep any records. Leaving or refreshing this page will delete all your data, so print reports and export the data or graphs if you want to save them.
Beta version: See disclaimer at foot of page.
🚜 Fertiliser Placement Machine Calibration Tool v1.0.0
For placement machines that apply fertiliser in lines
Application Rate Formula:
Application Rate (kg/ha) = [Total Discharge Rate (kg/min) / (Machine Width (m) × Travel Speed (km/h))] × 600
Measure the discharge from each outlet individually. Run each outlet for a measured time period (minimum 30 seconds) and weigh the fertiliser collected.
📊 Fertiliser Placement Machine Calibration v1.0.0
Complete the calibration test and calculate the application rate to see results here.
Calibration Process:
- Enter machine configuration (width, number of outlets)
- Measure or calculate travel speed
- Measure discharge from each outlet over a timed period
- Calculate individual outlet discharge rates
- Calculate total application rate
Note: Placement machines are simpler to calibrate than broadcast spreaders because there is no spreading pattern to measure. Each outlet delivers fertiliser in a line, so uniformity depends on consistent discharge from all outlets.
📋 Report Features
- Generate Report: Professional calibration certificate with all test results
- Export Data: CSV file with all measurements and calculations
- Export Chart: PNG image of outlet application rates chart
- Print Report: Printer-friendly calibration certificate