Wheat yield constraint calculator

Calculate the potential yield of your wheat crop and identify potential constraints that may be limiting your yield.

Read about our selection process for including tools on Climate Kelpie

 

Who this tool is for

Dryland and irrigation grain growers throughout Australia.

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Questions this tool answers

  • Is there a constraint limiting my potential yield? If so, what is it?
  • What is the yield potential of my crop under current management and forecast conditions?

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What this tool does

The tool will help you identify areas in your wheat crop that aren't reaching their yield potential and areas that are.

It estimates water-limited yield potential to account for soil plant available water capacity (PAWC), stored soil water at sowing and the amount of seasonal rainfall.

Use this information to identify if a constraint may be limiting your production potential.

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Inputs

  • search for your nearest Bureau of Meteorology weather station
  • choose your soil type
  • estimate your PAWC (a default PAWC is loaded when you select the soil)
  • enter wheat yield (tonnes per hectare) for each paddock for the past 5 years.

Here is a video walk-through of an example. (YouTube 4:50 min)

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Outputs

You will be presented with an interactive table and simple line graph, which plots your potential wheat yield.

When you put in your  yields for each previous year, you can see how it compares to the potential yields on the graph.

You can also view the water-use efficiency of your crop, which indicates the kilograms of grain produced from each millimetre of rain.

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Reliability

All weather data is supplied by the Australia Bureau of Meteorology from more than 670 weather stations around Australia.

The tool uses a modified French and Schultz equation to estimate water-limited yield potential to account for soil PAWC, stored soil water at sowing and the amount of seasonal rainfall.

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History

The Wheat yield constraint calculator is an output of the MyCrop project (DAW217) jointly funded by the Department of Agriculture and Food, Western Australia (DAFWA) and the Grain Research and Development Corporation.

The MyCrop project aims to help growers and advisers diagnose limits to achieving potential grain yield.

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Support available

Support is available from Kelly Ryan at DAFWA

Email: kelly.ryan@agric.wa.gov.au

Phone: 08 9368 3480

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Where to get it

The tool is free to use on the DAFWA website. There is no download.

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Cost

Free

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