No nutrient uptake by plants

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Tetsuro Kikuchi

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Jan 10, 2025, 12:47:00 PM1/10/25
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Hello,

I'm running SWAT+ (rev. 61.0.1) to simulate river water flow and nutrient discharges in an agricultural watershed in a tropical island of Japan.

The output, however, showed that crops did not uptake nutrients (N and P) at all (see Plant Growth_20250109.jpg (a screenshot from SWAT+ Check) and basin_pw_aa.csv as attached). Could anyone figure out what's wrong with the simulation setting and suggest the possible solutions for it?

On the other hand, the values of plant nutrient uptake in the nutrient balance output files were higher than zero, and P uptake was even higher than the P applied through fertilization (see basin_nb_aa.csv as attached). Could you also tell me the difference between the plant nutrient uptake in the plant weather output files (basin_pw) and that in the nutrient balance output files (basin_nb)?

Kind regards,

Tetsuro  
basin_pw_aa.csv
Plant Growth_20250109.jpg
basin_nb_aa.csv

Tetsuro Kikuchi

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Jan 14, 2025, 10:03:46 PM1/14/25
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Hello,

Attached is the TxtInOut for the simulation mentioned above. I'd appreciate it if anyone could check it and tell me whether there is anything wrong in the setting or not.

Kind regards,

Tetsuro

2025年1月11日土曜日 2:47:00 UTC+9 Tetsuro Kikuchi:
TxtInOut.zip

Natalja C.

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Jan 16, 2025, 12:23:58 PM1/16/25
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Hello,
This is a print error. We will fix it in the upcoming releases.
Thanks for pointing this out!
Natalja

Tetsuro Kikuchi

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Jan 17, 2025, 4:06:28 PM1/17/25
to SWAT+
Thank you for your reply. I understood that the current version of the model has a print error problem for nutrient uptake by plants.
I look forward to the release of the fixed version.

Tetsuro

2025年1月17日金曜日 2:23:58 UTC+9 Natalja C.:

Sikandar Ali

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Jan 29, 2025, 9:42:22 AM1/29/25
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I have develop and calibrated SWAT+ model for the Indus basin. Everything is fine and irrigation is applied for "agi1_lum" landuse as can be seen in screenshot attached. and rotation is "wwht_corn_rot"  I have run the model with and without fertilizer, but yield is zero. Can anyone help me where is the problem?

landuse .JPG
Yield1.JPG
managment schedule.JPG
landuse management.JPG
Yield2.JPG

Vijay Raj Singh

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Jul 1, 2026, 10:33:44 AMJul 1
to SWAT+
Were you able to solve the problem?

Tadesse M Ejeta

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Jul 2, 2026, 4:00:36 AMJul 2
to Vijay Raj Singh, SWAT+

Dear SWAT+ Model Producer Group

In SWAT+ 4.0.1 for Windows, under Step 2: Create HRUs, to generate a full HRUs shapefile, the 'Create HRUs' option is disabled. Could you kindly support updating to update the latest SWAT+ version?

With Best Regards,
Tadesse M Ejeta



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Chris George

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Jul 2, 2026, 6:36:45 AMJul 2
to Tadesse M Ejeta, SWAT+
The Create HRUs button is disabled until you have completed an option
for selecting HRUs.

Chris

On 7/2/2026 9:00 AM, Tadesse M Ejeta wrote:
> Dear SWAT+ Model Producer Group In SWAT+ 4. 0. 1 for Windows, under Step
> 2: Create HRUs, to generate a full HRUs shapefile, the 'Create HRUs'
> option is disabled. Could you kindly support updating to update the
> latest SWAT+ version? With
> ZjQcmQRYFpfptBannerStart
> This Message Is From an External Sender
> This message came from outside your organization.
> ZjQcmQRYFpfptBannerEnd
>
> Dear SWAT+ Model Producer Group
>
> In SWAT+ 4.0.1 for Windows, under Step 2: Create HRUs, to generate a
> full HRUs shapefile, the 'Create HRUs' option is disabled. Could you
> kindly support updating to update the latest SWAT+ version?
>
> With Best Regards,
> Tadesse M Ejeta
>
>
>
> *Please consider your environmental responsibility before printing this
> e-mail or any documents*
> **
>
>
>
>
>
>
> On Wed, Jul 1, 2026 at 5:33 PM Vijay Raj Singh
> <vijayraj...@gmail.com <mailto:vijayraj...@gmail.com>> wrote:
>
> Were you able to solve the problem?
>
> On Wednesday, January 29, 2025 at 8:12:22 PM UTC+5:30
> sikan...@gmail.com <mailto:sikan...@gmail.com> wrote:
>
> I have develop and calibrated SWAT+ model for the Indus basin.
> Everything is fine and irrigation is applied for "agi1_lum"
> landuse as can be seen in screenshot attached. and rotation is
> "wwht_corn_rot"  I have run the model with and without
> fertilizer, but yield is zero. Can anyone help me where is the
> problem?
>
> --
> You received this message because you are subscribed to the Google
> Groups "SWAT+" group.
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> send an email to swatplus+u...@googlegroups.com
> <mailto:swatplus+u...@googlegroups.com>.
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Tadesse M Ejeta

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Jul 2, 2026, 6:45:00 AMJul 2
to Chris George, SWAT+

Dear SWAT+ Model Producer Group

After completing an option under land use and soil for selecting HRUs. In the latest version (SWAT+ 4.0.1) for Windows, under Step 2: Create HRUs, to generate a full HRUs shapefile, the 'Create HRUs' option is disabled. Could you kindly support updating to update the latest SWAT+ version?

Chris George

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Jul 2, 2026, 8:43:36 AMJul 2
to Tadesse M Ejeta, SWAT+
In order to create HRUs you must open the HRUs tab, make sure one of the
Single/Multiple HRUs choices is selected. Unless it is one of the first
two Dominant choices, you also need to make a setting in the panel on
the right. For example, if you choose "Filter by landuse, soil, slope"
you need to set a landuse %, click Go, set a soil %, click Go, and if
you have made any slope bands set a slope %. Then Create HRUs will be
enabled.

If you are trying to create a fullHRUs shapefile then you need to select
the option "Read from maps".

Chris

On 7/2/2026 11:44 AM, Tadesse M Ejeta wrote:
> Dear SWAT+ Model Producer Group After completing an option under land
> use and soil for selecting HRUs. In the latest version (SWAT+ 4. 0. 1)
> for Windows, under Step 2: Create HRUs, to generate a full HRUs
> shapefile, the 'Create HRUs' option
> ZjQcmQRYFpfptBannerStart
> This Message Is From an External Sender
> This message came from outside your organization.
> ZjQcmQRYFpfptBannerEnd
>
> Dear SWAT+ Model Producer Group
>
> After completing an option under land use and soil for selecting HRUs.
> In the latest version (SWAT+ 4.0.1) for Windows, under Step 2: Create
> HRUs, to generate a full HRUs shapefile, the 'Create HRUs' option
> is disabled. Could you kindly support updating to update the latest
> SWAT+ version?
>
> With Best Regards,
>
> Tadesse M Ejeta
>
>
>
>
>
> **
> <mailto:vijayraj...@gmail.com
> <mailto:vijayraj...@gmail.com>>> wrote:
> >
> >     Were you able to solve the problem?
> >
> >     On Wednesday, January 29, 2025 at 8:12:22 PM UTC+5:30
> > sikan...@gmail.com <mailto:sikan...@gmail.com>
> <mailto:sikan...@gmail.com <mailto:sikan...@gmail.com>> wrote:
> >
> >         I have develop and calibrated SWAT+ model for the Indus
> basin.
> >         Everything is fine and irrigation is applied for "agi1_lum"
> >         landuse as can be seen in screenshot attached. and
> rotation is
> >         "wwht_corn_rot"  I have run the model with and without
> >         fertilizer, but yield is zero. Can anyone help me where
> is the
> >         problem?
> >
> >     --
> >     You received this message because you are subscribed to the
> Google
> >     Groups "SWAT+" group.
> >     To unsubscribe from this group and stop receiving emails from it,
> >     send an email to swatplus+u...@googlegroups.com
> <mailto:swatplus%2Bunsu...@googlegroups.com>
> >     <mailto:swatplus+u...@googlegroups.com
> <mailto:swatplus%2Bunsu...@googlegroups.com>>.
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> >
> > --
> > You received this message because you are subscribed to the Google
> > Groups "SWAT+" group.
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> send
> > an email to swatplus+u...@googlegroups.com
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Tadesse M Ejeta

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Jul 2, 2026, 12:49:05 PMJul 2
to Chris George, SWAT+

Dear SWAT+ Model Producer Group

After completing an option under land use and soil for selecting HRUs. In the latest version (SWAT+ 4.0.1) for Windows, under Step 2: Create HRUs, to generate a full HRUs shapefile, the 'Create HRUs' option is disabled. To create HRUs, there is no option to select Single/Multiple HRUs choices in the latest version (SWAT+ 4.0.1) for Windows. Could you kindly support updating to the latest SWAT+ version?

Tadesse M Ejeta

unread,
Jul 3, 2026, 2:29:17 AMJul 3
to Chris George, SWAT+

Dear SWAT+ Model Producer Group

After completing an option under land use and soil for selecting HRUs. In the latest version (SWAT+ 4.0.1) for Windows, under Step 2: Create HRUs, to generate a full HRUs shapefile, the 'Create HRUs' option is disabled. To create HRUs, there is no option to select Single/Multiple HRUs choices in the latest version (SWAT+ 4.0.1) for Windows. Could you kindly support updating to the latest SWAT+ version?

image.png

Chris George

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Jul 3, 2026, 9:56:11 AMJul 3
to Tadesse M Ejeta, SWAT+, Chris George
In order to create HRUs you must open the HRUs tab, make sure one of the
Single/Multiple HRUs choices is selected. Unless it is one of the first
two Dominant choices, you also need to make a setting in the panel on
the right. For example, if you choose "Filter by landuse, soil, slope"
you need to set a landuse %, click Go, set a soil %, click Go, and if
you have made any slope bands set a slope %. Then Create HRUs will be
enabled.

Chris

On 7/2/2026 11:44 AM, Tadesse M Ejeta wrote:
> Dear SWAT+ Model Producer Group After completing an option under land
> use and soil for selecting HRUs. In the latest version (SWAT+ 4. 0. 1)
> for Windows, under Step 2: Create HRUs, to generate a full HRUs
> shapefile, the 'Create HRUs' option
> ZjQcmQRYFpfptBannerStart
> This Message Is From an External Sender
> This message came from outside your organization.
> ZjQcmQRYFpfptBannerEnd
>
> Dear SWAT+ Model Producer Group
>
> After completing an option under land use and soil for selecting HRUs.
> In the latest version (SWAT+ 4.0.1) for Windows, under Step 2: Create
> HRUs, to generate a full HRUs shapefile, the 'Create HRUs' option
> is disabled. Could you kindly support updating to update the latest
> SWAT+ version?
>
> With Best Regards,
>
> Tadesse M Ejeta
>
>
>
>
>
> **
> <mailto:vijayraj...@gmail.com
> <mailto:vijayraj...@gmail.com>>> wrote:
> >
> >     Were you able to solve the problem?
> >
> >     On Wednesday, January 29, 2025 at 8:12:22 PM UTC+5:30
> > sikan...@gmail.com <mailto:sikan...@gmail.com>
> <mailto:sikan...@gmail.com <mailto:sikan...@gmail.com>> wrote:
> >
> >         I have develop and calibrated SWAT+ model for the Indus
> basin.
> >         Everything is fine and irrigation is applied for "agi1_lum"
> >         landuse as can be seen in screenshot attached. and
> rotation is
> >         "wwht_corn_rot"  I have run the model with and without
> >         fertilizer, but yield is zero. Can anyone help me where
> is the
> >         problem?
> >
> >     --
> >     You received this message because you are subscribed to the
> Google
> >     Groups "SWAT+" group.
> >     To unsubscribe from this group and stop receiving emails from it,
> >     send an email to swatplus+u...@googlegroups.com
> <mailto:swatplus%2Bunsu...@googlegroups.com>
> >     <mailto:swatplus+u...@googlegroups.com
> <mailto:swatplus%2Bunsu...@googlegroups.com>>.
> >     To view this discussion visit https://groups.google.com/d/
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> >
> > --
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