SYN [Select Your Nitrogen]

SYN is a spreadsheet-based decision-support tool for quantifying nitrogen availability and crop response.

Read about our selection process for including tools on Climate Kelpie

 

Who this tool is for

Broadacre non-legume cropping farmers in Western Australia.

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Questions this tool answers

How much nitrogen should I use to achieve a specific yield target, crop quality and gross margin?

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What this tool does

SYN is designed to give you a quantitative feel for how different components of the farming system (e.g. rotation, tillage, soil type and rainfall) can affect:
soil nitrogen availability
grain yield
quality (e.g. protein in barley)
dollar returns
The main purpose of SYN is not to recommend a fertiliser rate; rather it is to show the consequences of any possible nitrogen management strategy in any cropping situation.
You need Microsoft Excel® to run SYN.

SYN is designed to give you a quantitative feel for how different components of the farming system (e.g. rotation, tillage, soil type and rainfall) can affect:

  • soil nitrogen availability
  • grain yield
  • quality (e.g. protein in barley)
  • dollar returns

The main purpose of SYN is not to recommend a fertiliser rate; rather it is to show the consequences of any possible nitrogen management strategy in any cropping situation.

You need Microsoft Excel® to run SYN.

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Inputs

You enter information about your soil, rainfall, cultivar, fertiliser, costs and prices, and rotation phases.

You also have to estimate yields, harvest indices and pasture composition.

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Outputs

SYN displays graphs of soil and nitrogen availability, yield quality (in terms of protein or oil), and dollar returns.

Sensitivity analyses of crop responses to rate of fertiliser, timing of fertiliser and yield potential are also graphed. Figures 1 and 2 are examples.

Figure 1. Forms of nitrogen over time

 

Figure 2. Rooting depth and wetting front over time

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Reliability

SYN is accurate to the paddock scale.

Seasonal forecasts are not incorporated. Climate data is historical data which will become less applicable as the climate changes.

SYN was last updated in May 2003.

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History

SYN was developed by Bill Bowden and Art Diggle, Department of Agriculture and Food, Western Australia.

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Support available

Contact Bill Bowden, Department of Agriculture and Food

Email: bbowden@agric.wa.gov.au

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Where to get it

SYN is available on CD-ROM which includes a user manual (PDF).

Contact Bill Bowden, Department of Agriculture and Food, Western Australia

Email: bbowden@agric.wa.gov.au

Phone: 08 9690 2190

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Cost

Free

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JRegistry Object
(
    [data:protected] => stdClass Object
        (
            [pathwaypage] => 0
            [pathwaytype] => 1
            [scale] => 
            [topic] => Nitrogen needs
            [cost] => Free
            [summary_commodity] => Grains
            [summary_region] => Western Australia
            [tabledisplayscale] => 0
            [tablesubpagetitle] => Page
        )

)


JRegistry Object ( [data:protected] => stdClass Object ( [pathwaypage] => 0 [pathwaytype] => 1 [scale] => [topic] => Nitrogen needs [cost] => Free [summary_commodity] => Grains [summary_region] => Western Australia [tabledisplayscale] => 0 [tablesubpagetitle] => Page ) )

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