HowWet?

HowWet? is a program that uses farm rainfall records to estimate plant available water and nitrate in the soil at planting and throughout the fallow season.

Read about our selection process for including tools on Climate Kelpie

 

Who this tool is for

Grain growers in regions where soil water and nitrate at planting are important to crop management.

 

Questions this tool answers

  • Given my local rainfall to date this year, how much water has been stored in my soil?
  • Based my soil moisture, what crop should I plant and how much fertiliser do I need?

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What this tool does

HowWet? is a computer program that uses farm rainfall records to estimate how much:

  • rain has been stored as plant-available water
  • nitrogen has been mineralised in soil
  • erosion was caused by runoff water during the fallow period

This information should help you decide what crop to plant and how much fertiliser to use.

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Inputs

  • Your soil type and climate region
  • Your farm rainfall data

HowWet? contains tables of weekly temperatures and evaporation rates.

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Outputs

HowWet? output is displayed as tables of total rainfall, runoff, evaporation and mineralised nitrogen.
You can choose from a series of graphs.
Figures 1 and 2 are examples.
[Insert image name: HowWet Results.jpg
Alignment: right
Image description: Main results table
Caption: Figure 1. The main results table from HowWet?]
Figure 1. The main results table from HowWet?
[Insert image name: HowWet Graph.jpg
Alignment: right
Image description: Soil nitrogen graph
Caption: Figure 2. HowWet? graph showing soil nitrogen levels]
Figure 2. HowWet? graph showing soil nitrogen levels

HowWet? output is displayed as tables of total rainfall, runoff, evaporation and mineralised nitrogen.

You can choose from a series of graphs.

Figures 1 and 2 are examples.

 Soil nitrogen graph

Main results table

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Reliability

HowWet? uses a standard water-balance algorithm, similar to those used in APSIM.

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History

HowWet? was developed by Agricultural Production Systems Research Unit (APSRU).

It was further developed into the Australian CliMate app and website by the Australian CliMate team.

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Support available

Dr David Freebairn

Email: david.freebairn@gmail.com

Refer to the HowWet? webpage for more information and a fact sheet.

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Where to get it

Visit HowWet? to download the software and fact sheet.

If you want to use HowWet? as an app or on the web, go to the Australian CliMate tool.

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Cost

Free

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JRegistry Object
(
    [data:protected] => stdClass Object
        (
            [pathwaypage] => 0
            [pathwaytype] => 1
            [scale] => 
            [topic] => Soil moisture
            [cost] => Free
            [summary_commodity] => Grains
            [summary_region] => Regions where soil water and nitrate at planting are important (particularly northern grain systems on clay soils)
            [tabledisplayscale] => 0
            [tabledisplaycost] => 0
            [tabledisplaytopic] => 0
            [tablesubpagetitle] => Page
        )

)


JRegistry Object ( [data:protected] => stdClass Object ( [pathwaypage] => 0 [pathwaytype] => 1 [scale] => [topic] => Soil moisture [cost] => Free [summary_commodity] => Grains [summary_region] => Regions where soil water and nitrate at planting are important (particularly northern grain systems on clay soils) [tabledisplayscale] => 0 [tabledisplaycost] => 0 [tabledisplaytopic] => 0 [tablesubpagetitle] => Page ) )

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