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An email exchange between Neville H, Dean H and John H on this issue. Read from bottom up.

Subject:

RE: help with running AUSFARM pasture component in APSIM

Date:

Thu, 27 Jan 2011 21:34:48 +1100

From:

Hargreaves, John (CES, Toowoomba) <John.Hargreaves@csiro.au>

To:

Holzworth, Dean (CES, Toowoomba) <Dean.Holzworth@csiro.au>

CC:

Herrmann, Neville (PI, Black Mountain) <Neville.Herrmann@csiro.au>, Robertson, Michael (CES, Floreat) <Michael.Robertson@csiro.au>, Huth, Neil (CES, Toowoomba) <Neil.Huth@csiro.au>

Yes.

From: Holzworth, Dean (CES, Toowoomba)
Sent: Thursday, 27 January 2011 2:20 PM
To: Hargreaves, John (CES, Toowoomba)
Cc: Herrmann, Neville (PI, Black Mountain); Robertson, Michael (CES, Floreat); Huth, Neil (CES, Toowoomba)
Subject: Re: help with running AUSFARM pasture component in APSIM

Thanks John

Our plant models already talk directly to SoilWat. Surely the pasture science converter shouldn't be doing it for them. It only needs to deal with the Pasture model. Yes?

Dean

On 27/01/2011 1:33 PM, Hargreaves, John (CES, Toowoomba) wrote:

Hi Dean,

The answer is simple – the pasture science converter can only handle one “crop” (as you observed) because at the time of writing the interface for c++ modules did not have a way of handling multiple responses from multiple crops. The current problem is the module is being used outside of its scope. Shouldn’t be hard for you to update it to handle multiple crops to remove this limitation as this was the intention when the interface eventually got the appropriate capability.

Cheers

John

From: Holzworth, Dean (CES, Toowoomba)
Sent: Thursday, 27 January 2011 11:18 AM
To: Hargreaves, John (CES, Toowoomba)
Cc: Herrmann, Neville (PI, Black Mountain); Robertson, Michael (CES, Floreat); Huth, Neil (CES, Toowoomba)
Subject: Re: help with running AUSFARM pasture component in APSIM

Hi John

Mike is having a problem with running the AusFarm pasture model in rotation with APSIM plant models - see email chain below from bottom up).

The PastureScienceConverter is asking for a single sw_uptake variable and is getting multiple responses. It appears the science converter gets sw_uptake and then does a set for dlt_sw_dep. I guess this was done so that the Ausfarm pasture model talks to soilwat the way our crops do. Problem is that won't work with our plant models as they have an sw_uptake output variable but they also talk directly to soilwat, so uptake will actually happen twice. Is all this correct?

Question for Neville: does the Ausfarm Pasture do a set for dlt_sw_dep, dlt_no3, and dlt_nh4?? If so, then this code in Pasture science converter isn't needed any more.

We need to sort this mess out!
Dean

On 21/01/2011 1:37 PM, Herrmann, Neville (PI, Black Mountain) wrote:

Dean,

The AusFarm Pasture component has the sw_uptake registered as a readable property. It appears that the 'AusfarmPasture' component referred to in the error message is in fact the APSIM PastureScienceConverter.dll. The science converter appears to be retrieving this property from a number of plant models as well as the 'AusfarmPastureModel' (pasture.dll).

Hope this helps.

Nev H

On 20/01/2011 4:49 PM, Holzworth, Dean (CES, Toowoomba) wrote:

Hi Mike

I'm not sure why the Ausfarm pasture model is looking for sw_uptake. Yes, they are output variables from our crops but why AusFarm pasture is interested in them is a mystery. Neville, can you shed some light on this?

The Ausfarm pasture model sow command is different to the apsim one. You need to use the special sow rule which can be found under the pasture folder in the standard toolbox. It's called sow.

This is for APSIM 7.2. Might be located in a different place for earlier versions.

There are some example simulations that sow (and graze) the Ausfarm Pasture model in APSIM. It might be worth looking at them. If you click on New, there are 3 example simulations:

TemperateGrass - this sows the Ausfarm pasture model
TemperateGrassEstablished - this starts the simulation with the pasture already established - lots more parameters to configure!
Wether Lucerne Suppliement - an example of the AusFarm STOCK model grazing our lucerne model.

You can cut / paste and change these to suit your needs. It's often easier to do that than try starting from scratch.

Hope this helps.
Dean

On 14/01/2011 12:28 PM, Robertson, Michael (CES, Floreat) wrote:

Dear Dean and Neil

I know you have been very pre-occupied with events in Toowoomba and surrounds in the last week or so. I have been thinking of you and wondering how it has been affecting the team in Toowoomba, knowing (thankfully) that you are all safe.

When you are back on deck and ready to cope with this request for help, I would appreciate it. I am trying to do some simulations of rotation involving APSIM crops and AusFarm pastures, but have come up against a barrier when trying to run the AusFarm components. One issue seems to be around who owns water uptake (!), as this error message conveys:

APSIM Fatal Error

-------------------

The module AusfarmPasture has asked for the value of the variable sw_uptake.

It received multiple responses when only 1 was expected.

It received values from the following modules:

.MasterPM.w.wheat

.MasterPM.w.canola

.MasterPM.w.lupin

.MasterPM.w.lucerne

.MasterPM.w.AusfarmPastureModel

Component name: AusfarmPasture

The other issue is even when I remove the APSIM crops from the simulation the simulation with the pasture will run with the soil modules OK but not “sow” anything. I am not sure how to initialise it and there doesn’t seem to be any documentation to help me with this. After these issues are solved I imagine there will be issues around getting STOCK to run.

If you have an example that runs successfully, I am happy to use that, otherwise any specific assistance you can give me would be appreciated

Thanks

Mike

Last changed by	devoil
Reported By	devoil
Reported On	2012-02-02 10:57 AM
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Category	Bug
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Reported By	har297
Reported On	2012-02-01 3:43 PM
Project	User Interface
Category	Bug
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Assigned	hol353
Status	re-opened
Apsim Version	7.3
Your Name	John Hargreaves
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Reported By	guest
Reported On	2012-01-30 3:40 PM
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Category	Minor
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Assigned	hut104
Status	Submitted
Apsim Version	7.3
Your Name	Jody Biggs
Contact Details	jody.biggs@csiro.au 07 3833 5704

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Reported On	2011-12-09 5:09 PM
Project	Infrastructure
Category	Minor
Priority	low
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Apsim Version	7.4
Your Name	Jeremy Whish
Contact Details	jeremy.whish@csiro.au

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Reported On	2011-12-07 7:33 AM
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Reported On	2011-11-17 11:25 AM
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Reported On	2011-08-04 11:41 AM
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Reported On	2010-11-18 11:37 AM
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Apsim Version	7.2
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Reported On	2006-10-25 3:30 AM
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Priority	low
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Status	2_Evaluation
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