The Nutrient Calculator determines nutrient status, and estimates the quantities of phosphorus, potassium or sulphur required to increase current soil test values to meet target values (termed ‘capital quantity’) to achieve a user-defined relative yield.
It uses soil test results from a representative 0–10 cm soil sample that has been analysed for phosphorus buffering index (PBI), Colwell phosphorus, Colwell potassium, sulphur (KCl-40S) and pH (CaCl2).
Growers and consultants can manually enter their soil test results or import results from a spreadsheet to produce colour coded reports.
Note:
- The calculator is intended only for high rainfall (>600 mm annual) pastures in south west Western Australia. The calculator uses soil sample test results to estimate soil nutrient status and requirements, and the fertiliser rates to supply required nutrients.
- The calculator uses critical soil test values derived from nutrient response trials across Australia to estimate soil nutrient status. It does not analyse the economics of the estimated nutrients required.
Detailed instructions are available via download or video.
The Nutrient calculator uses soil test results from a representative 0–10 cm soil sample that has been analysed for phosphorus buffering index (PBI), Colwell phosphorus, Colwell potassium, sulphur (KCl-40S) and pH (CaCl2).
Growers and consultants can manually enter their soil test results or import results from a spreadsheet to produce colour coded reports.
The calculator determines nutrient status, and estimates the quantities of phosphorus, potassium or sulphur required to increase current soil test values to meet target values (termed ‘capital quantity’) to achieve a user-defined relative yield.
The calculator uses critical soil test values derived from nutrient response trials across Australia to estimate soil nutrient status. It does not analyse the economics of the estimated nutrients required.