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.

APSIM Factorials