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7.0.1.3 Running the PS1 model

In this section we will run the PS1 model for Rajkot2004 and for other weather stations and years.

What do you need?

Data

For your convenience, all data was packaged into a zip file: IndiaData.zip. Download the zip file, and extract the files that it contains to your local hard disk. Remember in which directory/folder you stored the files.

Also for your convenience, a PDF was created with which you can quickly lookup the julian day number and calendar dates, see daynrs_calendardates.pdf.

Starting the ProductionAlgorithm program

Start the following Java webstart link ProductionAlgorithm.

The ProductionAlgorithm Java program is downloaded to your local computer, and it opens with the following screen:

images/idv_india/ProdAlgForm1.jpg

The ProductionAlgorithm form contains a number of sections, which may not be very clear to a new user:

When the ProductionAlgorithm form is active, you can change any input values; if you click the Calculate button again, all output values are automatically recalculated.

Reading the data files

Click the Import Input Files button at the top left-hand side of the ProductionAlgorithm dialog box.

This will bring up a dialog box where you can pick a weather file, a crops file and choose a crop from there, and a management data file.

After you selected the files from your hard disk, the form should look as follows:

images/idv_india/ProdAlgImportDataForm2.jpg

When you click the OK button, all required data for PS1 is automatically read into the ProductionAlgorithm dialog box.

As you have unzipped the files onto your local hard disk, you can inspect the input files yourself with any ASCII editor.

Calculating yield

When you return to the ProductionAlgorithm dialog box, browse through the form. See that the weather data is filled out, the crop data, and the 3 management variables. The middle part of the form, directly after the management data is only used in case of PS2, so this can be skipped.

Inspecting the results

From www.ikisan.com/links/ap_groundnutHistory.shtml we find a FAO yield for groundnut in India of 967 kg/ha. Other groundnut yield values may be found at www.ficciagroindia.com/general/agriculture-statistics/4.15AllIndiaAreaProductionandYieldofGroundnut.pdf (groundnut yield India 2004 of 1020 kg/ha)or from www.icrisat.org/GroundNut/GroundNut.htm (average yield worldwide 1348 kg/ha).

Running the model again, without fixed relative humidity

You may run the model again in the same dialog box.

You now find a maximum yield of 1141 kg/ha.

Excercises

Answers:
Maximum yield Amreli2004: 6174 kg/ha
Maximum yield Dhanduka2004: 444 kg/ha;
Maximum yield Rajkot2004: 1163 kg/ha;
Maximum yields (kg/ha)
AmreliDhandukaRajkot
2000   
2001   
2002   
2003   
2004   

Answers:

Maximum yields (kg/ha)
AmreliDhandukaRajkot
20003146409973
2001734574558
2002665346337
200362845041345
200461744441163

7.0.1.3.0  Study area
7.0.1.3.1  Inspecting the weather data
7.0.1.3.2  Running the PS1 model

 


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U09-NRM-127: The role of Distributed Data Access Technologies in NRM - for ITC-IDV version 2.7 > Thematic Expert Models > Food security > Biophysical Production Simulations