GrassGro is composed of a number of sub models. The illustration below shows briefly how they interact.

 

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 More details about the sub models

Water Balance Model

Pasture Model

Multi-species model Daily time step Uniform field area Biomass-based

Processes modelled Phenology Resource acquisition Net primary productivity Allocation of assimilate Change in DMD Death & litter fall Seeds & seedlings

 

Ruminant Model

• • Based on Australian feeding standard – Dr Mike Freer

  • Intake

    • Potential intake
    • relative intake

  • Energy and protein use

 

• Mortality

 

Management & Economics Models

• Five livestock enterprises

• Profit drivers

  • Stocking rate and replacement policy
  • Reproductive management
  • Supplementary feeding
  • Soil fertility
  • Shearing

• Gross margin calculations

  • Long-term average and year-to-year variability

For a description of the animal model in GrassGro see the GrazFeed-models page on this website.