APSIM Factorials
Factorials in APSIM
• Why use Factorials?
• Basics of Factorial Configuration
• Using Met components
• Using Soil Components
• Using Manager Components
• Advanced Factorials

APSIM Factorials
Why use Factorials?

APSIM Factorials
Single Crop for CropARM
• 47 x Site
• 4 x Soil
• 3 x Starting Water
• 3 x Cultivar
• 4 x Sowing Density
• 5 x Sowing Dates
• 3 x Starting Nitrogen
• 3 x Row Spacing
• Total = 304,560 Runs

APSIM Factorials
Using Factorials
• Click the Factorial button on the Toolbar
• Right click – Add
Factor/Folder
• Drag items from the simulation tree across to the factor node

APSIM Factorials
Factorial Configuration
• Factorial Tree, Factor Targets

APSIM Factorials
Using Met Components
• 3 ways to add Met components
• Add multiple Met components to a factor node.
• Single silo component with a list of stations.
• Single met component with a list of file names.

APSIM Factorials
Using Soil Components

APSIM Factorials
Using Manager Components
• Use Sowing Rule to manage multiple
– Cultivars
– Densities
– Dates
– Row Spacing

APSIM Factorials
Multiple Simulations (304,560)

APSIM Factorials
Advanced Factorials
• Soils are not the same across all sites.
• 5 sites x 4 soils x 100 (5x4x4) sowing options = 2,000 runs..
• Add Folders & Sub Folders, which will change the way the factorials are calculated.
• It will make a list of the lowest folder nodes in the tree.

APSIM Factorials
Advanced Factorials
• Each identified folder is treated as a single set of factorials. These sets are then added together, not multiplied.
• WA has 1 site x 1 soil x 100 sowing.
Site & Soil are overridden.
100 Simulations
• SA has 1 site x 2 soils x 100 sowing.
200 Simulations.
• ALL has 3 sites and inherits all of the soils. 3 x 4 x 100 = 1200 Simulations

APSIM Factorials
Summary
• How Factorials can be used.
• Factorial Configuration Basics
• Using Met components.
• Using Soil Components.
• Using Manager Components.
• Advanced Factorials.