The wheat yield constraint calculator determines the potential wheat yield for one or more paddocks. Linked to over 670 weather stations you will be are able to graph actual wheat yield to potential yield as determined by rainfall.
Wheat yield constraint calculator
Please note: This content may be out of date and is currently under review.
A tool to calculate the potential yield of your wheat crop over a number of seasons. The wheat yield constraint calculator enables you to compare this with your actual yield to identify if your crop is consistently reaching its potential. Use this information to identify if a constraint may be limiting your production potential. You simply select a weather station located closest to your property for rainfall data. Choose the soil type which represents your paddock to determine water limited yield potential.
What does it mean?
The tool will help you identify areas in your wheat crop that are not reaching their yield potential and areas that are. It is based on a modified French and Shultz equation. This tool estimates water-limited yield potential to account for soil plant available water capacity (PAWC), stored soil water at sowing and the gross amount of seasonal rainfall.
Season and management will influence performance of a variety. A graphical display of potential and actual yield is provided. Consider the reasons for the performance of your paddock.
Constraint (%): percentage value of actual yield/potential yield. The higher the value, the better the performance.
Water use efficiency (WUE) indicates the kilograms of grain produced from each millimetre (mm) of rain using a modified French and Shultz equation. Values greater than 15 kilograms per mm of rain are an indication of good utilisation of rain.
The development of the yield constraint calculator is an output of the MyCrop project (DAW 217) which is jointly funded by the Department of Agriculture and Food, Western Australia and Grains Research and Development Corporation.