Model calibration using Gencalc in DSSAT 4.6

[@jalalelgadi4553]

Thank you very much Mr Villalobos for this great video, I have found here a solution for my problem in using the GENCALC program properly. The problem was that i didn't set the output files in the simulation options to default . I wish you all the best Jalal Elgadi

[@FranciscoVillalobos]

I'm glad to be of help. It took me a while to find out why it was not working

[@user-bz7fj1fk2m]

Dear Prof., really valuable presentation. Thank U and stay blessed for that!!!!

[@shimendigde9121]

Dear Prof, thank you so much for all the most insightful videos. I need to help me to know how can I correct, When i have created all the files and run the model i got the simulation result with the same value of all the treatments. How it possible to show different value of simulation as per the observed value of the treatments given?

[@FranciscoVillalobos]

If you have the same results, that means that all the treatments are the same. Revise them and check that they are correctly defined

[@masanelli.a]

Hola Francisco, muchas gracias por su video. Tengo una duda con respecto a los coeficientes genéticos, uno podría calibrar un cultivar y simularlo en varias localidades o los parámetros solo sirven para la localidad de calibración?

[@FranciscoVillalobos]

If the model is good (as we assume with most DSSAT models) the genetic coefficients should be independent of the location so calibration should be valid everywhere

[@masanelli.a]

@@FranciscoVillalobos thank you so much!

[@atsu_y9210]

Thank you mr.Villalobos. Is (A)file which is measured data adapted to genotype coefficient calculation? I really confused it. thank you

[@FranciscoVillalobos]

Yes, you may load A files to "Experimental data" and modify/add more data and after that you may save the A file.

[@louiepm1026]

Thank you very much, Senor Villalobos! Es muy bien! So, the objective of the calibration exercise which you did, was to be able to adapt the Grain Sorghum crop in DSSAT to the grain sorghum from the published experiment, yes?

[@louiepm1026]

By the way, Sir, would it be possible to inquire with you via email? If so, could you share your email address please? Mine is [e-mail]. Thank you!

[@prachisingh4752]

The value of Anthesis days and maturity day are different in experimental file and generated gencalc evaluate file ?

[@jorgesaez3488]

hola estimado, no tiene videos de DSSAT en español?

[@FranciscoVillalobos]

No

[@TG-hr2lt]

Hi., I have created the weather file but it is not showing up in the crop management when I chose the weather station. Can you tell me what could be wrong. Thanks

[@FranciscoVillalobos]

You need to Refresh everytime you add or change files

[@kewaltamrakar952]

Sir, what should i do if i have to calibrate the model for two years ?

[@surreal4628]

I am using Gencalc for calibration of a rice variety that is not in the list of variety mentioned in "RICE GENOTYPE COEFFICIENTS: RICER047 MODEL". After creating Maxima and minima how should I create a new cultivar parameter as initial guess?

[@FranciscoVillalobos]

Go to the genetics file and duplicate one cultivar. Use the copy as initial guess

[@surreal4628]

@@FranciscoVillalobos Thank you!

[@quanglam2975]

Hi Professor, I have created new cultivar in genetics file but when I open Genselct to select the new cultivar, there is no new cultivar can be found. Could you help me? How to update the Text file?

[@damiandulau1396]

The video is very useful. I would like to know what experimental data are necessary for sunflower. Thank you very much

[@rasoolkilani3170]

Dr. Villalobos, this is an amazing effort, I recommend your videos to all my colleagues. I was just wondering, what was the name of the weather station you used for this experiment, and what type of soil did you use? the paper mentioned that investigation was carried over Typic Xerofluvent soil, but I couldn't find it in DSSAT, so it ok to just use Loam soil (SI. SOL)?

[@FranciscoVillalobos]

I think it was a weather station close to Cordoba, Spain. The typic Xerofluvents is a deep sandy loam

[@rasoolkilani3170]

@@FranciscoVillalobos Thank you so much, we are lucky to have you professor.

[@quanglam2975]

Dear Professor, my question regarding the calibration processes (e.g. Sorghum) is that I will set coefficient value for P1, P20,P2R, P5 following the path (C:\Dssat46\Tools\Gencalc\Gencalc2.rul) first, then change them according to simulation runs until simulated values match well observed values, Right? Thanks for your help.

[@TheVarahi]

How you created maxima and minima cultivars? Is it just by taking highest and lowest value of each genetic coefficients?

[@FranciscoVillalobos]

I did not create them. They are included in the standard release of DSSAT. Probably you are right and they only reflect extreme values of the parameters

[@TheVarahi]

@@FranciscoVillalobos Thank you for help . Is Gencalc in DSSAT 4.6 and GLUE coefficient estimator in DSSAT 4.7 same?

[@FranciscoVillalobos]

Gencalc and GLUE are both in DSSAT 4.6. Probably they have not changed in DSSAT 4.7 but I'm not sure. You may consult with DSSAT people.

[@FranciscoVillalobos]

Francisco Villalobos 5 months ago Goto File > Update LST files, etc.. The same question was replied some time ago (see below)

[@cacatacute14]

Hi. after adding a new cultivar and its parameters in the .cul file, i tried running an experiment using this new cultivar. but it returns an error message saying "Error key: IPVAR". how can I fix this?

[@FranciscoVillalobos]

maybe you have not updated the list files

[@cacatacute14]

@@FranciscoVillalobos thank you. I'm new to DSSAT. How is updating done?

[@FranciscoVillalobos]

Goto File > Update LST files, etc..

[@cacatacute14]

@@FranciscoVillalobos Thank you. It's running now

[@kewaltamrakar952]

Sir, I have got all these experimental data except leaf area index for wheat can the calibration be done without leaf area index data ?

[@FranciscoVillalobos]

I think so

[@ANSHUMANGUNAWATSamarpan]

yes if you do not enter observed data then no output was shown in results

[@louiepm1026]

Where is the SGA file (the table which you inputted) used? Please advise sir, thank you!

[@FranciscoVillalobos]

In the Sorghum folder

[@louiepm1026]

@@FranciscoVillalobos Got it, thank you! So, the .SGA and .SGX files need to have the same file name. By the way, Sir, is there a way I may contact you for consultation on using DSSAT for rice? I am getting good % grain fill, but my grain weight is all zero!

[@FranciscoVillalobos]

@@louiepm1026 I',

[@FranciscoVillalobos]

@@louiepm1026I'm not an expert in DSSAT for rice so I do not think I'm the right person to help you with that. You should look in the literature for other users

[@louiepm1026]

@@FranciscoVillalobos I see, thank you, Prof Villalobos! I will do so, then. It's just that I found your videos really easy to understand that I approached you here. Thanks again!

[@ncamsileshongwe2677]

Thank you sir for the great works you are contributing to the world. can you please upload videos on transpiration modelling . I know you have a very simplified model on transpiration using canopy conductance (gc)

[@yangyuesun4563]

Do you know Weatherman well? I had some problems about that. Thanks

[@quanglam2975]

Dear Prof Villalobos, Thanks for your video. It is really helpful to me. I have a question about the Experimental table: If i do treatments for 2 to 3 consecutive years (one measurement every year), how can i put observed values to the table? Thanks you in advances. Dlam

[@FranciscoVillalobos]

Add the different treatments in the following year as additional treatments. Note that a treatment may be placed in any year

[@quanglam2975]

@@FranciscoVillalobos If a treatment may be placed in any year, then the observed value mentioned in table will be the average value of those figures over the years? If not, please advise me how to add those observed values into the Table. For this case, how can Model realize the observed value of each year?

[@FranciscoVillalobos]

@@quanglam2975 As I said add them as different treatments. I cannot give more detail as I'm not your personal advisor

[@dagnekafani]

Dear prof. thanks for your help your videos are helpful really. my problem is I have soil Data of column of 17 and raws of 7 but in DSSAT I have seen only the table that have 12 columns so how can I feed my data in DSSAT 46? thank you, prof.

[@FranciscoVillalobos]

I don't understand your question about " soil Data of column of 17 and raws of 7". What table in DSSAT are you talking about?

[@dagnekafani]

@@FranciscoVillalobos Dear prof. this is my soil data I didn't get enough place for my soil data in DSSAT. @SITE COUNTRY LAT LONG SCS FAMILY ET ET 8.97 37.88 Eutric Regosol @ SCOM SALB SLU1 SLDR SLRO SLNF SLPF SMHB SMPX SMKE -99 0 6 0 81 1 1 IB001 IB001 IB001 @ SLB SLMH SLLL SDUL SSAT SRGF SSKS SBDM SLOC SLCL SLSI SLCF SLNI SLHW SLHB SCEC SADC 13 -99 .092 .189 -99 -99 -99 1.36 2.76 22.7 12 -99 .21 6.2 -99 15 -99 45 -99 .077 .148 -99 -99 -99 1.33 .832 26.7 12 -99 .09 6.5 -99 14.2 -99 78 -99 .084 .163 -99 -99 -99 1.37 .562 30.7 6 -99 .06 6.8 -99 11.7 -99 110 -99 .088 .177 -99 -99 -99 1.48 .407 32.7 8 -99 .03 6.8 -99 13.6 -99 153 -99 .085 .157 -99 -99 -99 1.56 .394 20.7 8 -99 .03 7.1 -99 9.8 -99 187 -99 .109 .155 -99 -99 -99 1.59 .365 28.7 6 -99 .05 7.2 -99 10.7 -99

[@FranciscoVillalobos]

@@dagnekafani You can always edit manually the soil file in DSSAT using a text editor. Add your soil and make sure you keep the same structure

[@dagnekafani]

@@FranciscoVillalobos Thank you, Prof.

[@kobulievmuhammadjon936]

How to be with DSSAT 4.7 ? the Genotypes are different here...

[@FranciscoVillalobos]

The structure is exactly the same. Only names change, so anywhere you see "046" change it to "047". For instance SGCER046.CUL will be now \SGCER047.CUL

[@kobulievmuhammadjon936]

@@FranciscoVillalobos Dear, you have not changed anything in Gencalc, when I do the same for Ceres Wheat in the Genotype calculator, it only works 14 times out of 504 and it stuck. It then shows that there are some errors, and there are no calibration values, such as yield, analysis and days of maturity, only what I get is -99 for the entire set of values.

[@kobulievmuhammadjon936]

@@FranciscoVillalobos Also, it does not show actual data, simulated values ​​at all ( -99 for the whole set of values).

[@FranciscoVillalobos]

@@kobulievmuhammadjon936 For issues with DSSAT programs please contact the authors

[@kobulievmuhammadjon936]

@@FranciscoVillalobos Dear, At least I did something with grain sorghum, so I did exactly same as you doing in this video. The results of calibration for: Emergence Date _7-7_ Antesis Date _57-57_ Maturity Date. _90-86_ LAIX. _5.23-5.13_ Yield 😓 _2577-4560_ Although you have mansion that harvested yield is not useful for the calibration but I got a huge gap😔

[@trivikramraju9655]

can we introduce/create new crop files like cucumber?

[@FranciscoVillalobos]

No, we would need first a crop model for cucumber

[@trivikramraju9655]

hello sir greetings I wanted to work on the "modeling of crop parameters of cucumber crop in soilless growing media" is it possible sir, then how can I proceed? thank you

[@FranciscoVillalobos]

Not possible

[@shrutisingh9555]

Sir how u added data in experimental ie Anthesis date etc by just typing or inserting excel sheet.. jst after that the. Upper atc sorghum bar converted into dssat\ sorghum\ ...

[@FranciscoVillalobos]

Using a text editor

[@shrutisingh9555]

Text editor ?

[@shrutisingh9555]

@@FranciscoVillalobos sir will u plz elaborate how insert the inputs in experimental file ..as after u inserted the above search column content also changed. Do tell about this text editor thing.

[@FranciscoVillalobos]

@@shrutisingh9555 I don't understand your question.

[@shrutisingh9555]

Can I contact you some other way via email ?

[@surreal4628]

Sir, Please make a tutorial on Sensitivity analysis. It would be a great help.

[@ManojKumarJoshi-yd3tz]

Thank you so much sir.