WhopperCropper

WhopperCropper is a computer program that simulates the effects of your resources (e.g. soil and water) and farm management inputs (e.g. crop type and fertiliser) on yield and economic outcomes by using modelling and climate forecasting.

Read about our selection process for including tools on Climate Kelpie

 

Who this tool is for

Wheat and canola growers in southern Australia and all major winter and summer crops in northern Australia.

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Questions this tool answers

At farm-scale to locality/shire scale:
how much nitrogen do my cereal crops need and what yields am I likely to get this season?
given farm inputs and forecasts based on the Southern Oscillation Index [link to Queensland – weather and climate drivers page], what yields and gross margins am I likely to get this season?

At farm-scale to locality/shire scale:

  • how much nitrogen do my cereal crops need and what yields am I likely to get this season?
  • given farm inputs and forecasts based on the Southern Oscillation Index [link to Queensland – weather and climate drivers page], what yields and gross margins am I likely to get this season?

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What this tool does

WhopperCropper is a computer program designed to be used in farmer workshops where you explore crop management options for the coming season by assessing your exposure to climate and market risk.

You can compare different inputs and it simulates outcomes (in terms of gross margins).

WhopperCropper uses:

APSIM

100 years of historical climate records

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Inputs

You can enter:

  • crop type
  • maturity length
  • sowing density
  • soil water-holding capacity
  • stored soil water at sowing
  • sowing date
  • soil nitrogen content
  • nitrogen fertility rate
  • Southern Oscillation Index phase

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Outputs

WhopperCropper calculates 50 different outputs including:

  • yield
  • soil water
  • soil nitrogen
  • phenology
  • leaf area index
  • crop temperatures
  • water use efficiency
  • costs
  • returns
  • gross margin

You can choose to see the results as graphs over time or probability graphs.

Figures 1 and 2 are examples.

Figure 1. Annual variability of grain yields

 

 

Figure 2. What is the potential yield response to nitrogen fertiliser? Answer: excellent response to applied N to 50kgN/ha, then no response.

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Reliability

WhopperCropper is restricted to a number of commodities and varieties.

It works best at the locality/district scale.

Accuracy will diminish as our climate changes because the outputs are based on historical climate data.

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History

WhopperCropper was developed by the Agricultural Production Systems Research Unit and has drawn on the skills of many research and extension officers.

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Support available

For support and information about the research, contact Howard Cox, Department of Agriculture, Fisheries and Forestry (Queensland)

Email: howard.cox@daff.qld.gov.au

Phone: 07 4688 1381 or 0418 708 278

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Where to get it

Contact Howard Cox, Department of Agriculture, Fisheries and Forestry (Queensland)

Email: howard.cox@daff.qld.gov.au

Phone: 07 4688 1381 or 0418 708 278

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Cost

Free

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JRegistry Object
(
    [data:protected] => stdClass Object
        (
            [pathwaypage] => 0
            [pathwaytype] => 1
            [scale] => 
            [topic] => Nitrogen needs and likely yields and gross margins
            [cost] => One-off fee
            [summary_commodity] => Grains (wheat and canola in southern Australia and all major winter and summer crops in northern Australia)
            [summary_region] => All major cropping regions
            [tabledisplayscale] => 0
            [tablesubpagetitle] => Page
        )

)


JRegistry Object ( [data:protected] => stdClass Object ( [pathwaypage] => 0 [pathwaytype] => 1 [scale] => [topic] => Nitrogen needs and likely yields and gross margins [cost] => One-off fee [summary_commodity] => Grains (wheat and canola in southern Australia and all major winter and summer crops in northern Australia) [summary_region] => All major cropping regions [tabledisplayscale] => 0 [tablesubpagetitle] => Page ) )

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