Creation of New SoilNutrient Model

[hut104]

A new model will be created with the aim to replace the soilN model in the longer term. It will provide a capacity to model C and N cycling, initially, with P and K cycling to be added later. It will be developed using approaches developed for PMF.

[sarahcleary]

@hut104 - any update?

[sarahcleary]

@hut104 - any update?

[hut104]

Hope to complete during code sprint in NZ early March From: sarahcleary <[email protected]> Sent: Tuesday, 25 February 2020 9:36 AM To: APSIMInitiative/ApsimX <[email protected]> Cc: Huth, Neil (A&F, Toowoomba) <[email protected]>; Mention <[email protected]> Subject: Re: [APSIMInitiative/ApsimX] Creation of New SoilNutrient Model (#1540) @hut104<https://github.com/hut104> - any update? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub<#1540?email_source=notifications&email_token=AC2UVWTBTB6R2ADXQBZKFZTRERKWZA5CNFSM4DCOQNCKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEMZ6KRQ#issuecomment-590603590>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AC2UVWTQXRXC4VX5ZOFL47LRERKWZANCNFSM4DCOQNCA>.

[hut104]

Hi @sno036
This has been fixed. It was related to PlantAvailableNO3 and PlantAvailableNH4.

Hi @hut104 - I have done a small comparison with a simple simulation of a cutting trial with AgPasture comparing Nutrient and SoilNitrogen and there is some weirdness going on with differring production, differing responses to fertiliser and a bizarre spike in no3 and minn that crashes on 7 Jan. Possibly there is something wrong with the comparison I've set up so see the zipfile attached.

NutrientAgPastureV1.zip

[sarahcleary]

@sno036 and/or @hut104 - what is the next step?

[hut104]

The issues raised by the review have been addressed. Awaiting further response prior to final release.

…

________________________________ From: sarahcleary <[email protected]> Sent: Tuesday, 31 March 2020 10:16 PM To: APSIMInitiative/ApsimX <[email protected]> Cc: Huth, Neil (A&F, Toowoomba) <[email protected]>; Mention <[email protected]> Subject: Re: [APSIMInitiative/ApsimX] Creation of New SoilNutrient Model (#1540) @sno036<https://github.com/sno036> and/or @hut104<https://github.com/hut104> - what is the next step? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub<#1540 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AC2UVWTKPXR34U3MWYXYJ33RKHNLBANCNFSM4DCOQNCA>.

[sarahcleary]

@sno036 - this is with you now?

[JJguri]

I am trying to test the ability of the Nutrient model to predict different N scenarios using the sugarcane NG example (200 kgN/year in a 2000 mm/year environment).
I got N in biomass through two outputs ([Sugarcane].plant_n_tot and [Sugarcane].biomass_n), which is the difference between them? root_n?.
Then I got NO3 leaching and Nmineral through [Soil].SoilWater.LeachNO3 and [Nutrient].MineralN, respectively. Overall, NO3 was 40 times lower than N in biomass.
I am trying to close the N cycle counting for N pools in runoff and losses to the atmosphere. For N2O or Natm I used [Nutrient].N2Oatm and [Nutrient].Natm but these pools are always equal to 0. I did not find a way to count for N pools in runoff yet. Do you know how can I make the model sensible to N losses to the atmosphere and runoff? @hut104 @sno036 @Keith-Pembleton

[sarahcleary]

ACTION from last RP Meeting: @sno036 to rerun the test. If this is positive, then fully approved. @sno036 - is this ready for approval/release?
@hut104, @Keith-Pembleton - question above from @JJguri