Changing target degree days for specific crop growth stages

[jsenriquez21]

What is your question?

Greetings! I am trying to use APSIM to model growth of potatoes and to predict the specific timings of crop growth stages.

I need to tweak the required degree days needed to complete each growth stage (e.g. vegetative phase and senesced phase). How can I do this in R and APSIM-X?

Thank you very much!

[BrianCollinss]

If you right-click on the plant in your simulation and click on "Show Model Structure", you can then check the Cultivar folder and find out how each cultivar is parametrized. You will see things like this (the list of the parameters that you can change depends on the plant you are working with):

[Phenology].Emerging.Target.ShootLag.FixedValue = 10
[Phenology].Emerging.Target.DepthxRate.ShootRate.FixedValue = 1
[Phenology].Vegetative.Target.FixedValue = 350
[Phenology].EarlyFlowering.Target.FixedValue = 100
[Phenology].EarlyPodDevelopment.Target.FixedValue = 50

Then you can create/add your cultivar and use it when you call the Sow method.

[BrianCollinss]

If my answer helped, you can close this issue.

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