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About Crop Manager for Rice-based Systems

Crop Manager for Rice-based Systems (CMRS) aims to increase farmer's net income and sustain the productivity for rice-based cropping systems in Bihar, India. CMRS provides irrigated and rainfed farmers with rice-based cropping systems in Bihar with a crop and nutrient management guideline customized to the needs of an individual farmer. CMRS uses a farmer's answers to questions on farming practices to automatically generate a rice, wheat, or rabi maize management guideline aimed at increasing the farmer's net income.

CMRS is designed for use by extension workers, crop advisers, input providers, and providers of services who interview a farmer using a personal computer, smartphone, or tablet. After the interview, the collected information can be stored on the computer, smartphone, or tablet until the device is connected to the Internet through a Web browser. Collected information is then transmitted via the Internet to the CMRS 'model', which calculates and transmits a crop management guideline for rice, wheat or rabi maize in rice-based croppping systems within moments back to the computer, smartphone, or tablet. Each guideline provides an actionable and unique recommendation for the crop, which matches the location-specific cropping practices and needs of the farmer. The guideline is then provided to the farmer as a one-page printout, which the extension worker, input provider, or provider of services can also use to advise the farmer on how to increase net income through improved crop management.

The concept and framework for CMRS was developed by IRRI. The nutrient management guideline provided by CMRS is based on the principles of site-specific nutrient management (SSNM), as developed for rice through partnerships of IRRI with national agricultural research organizations in Asia. The Nutrient Manager for Rice developed by IRRI in 2008-2010 and the more recent Nutrient Manager for Cereal Systems developed by IRRI provide the SSNM-based, nutrient management component in CMRS.

The Rice Crop Manager developed by IRRI in 2013 for the Philippines provided the framework for the crop management decision-making logic used in the subsequent Crop Manager for Stress-Tolerant Rice (CMSTR), Rice-Wheat Crop Manager (RWCM), and Rice-Maize Crop Manager (RMCM), which are now combined in CMRS.

CMSTR was adapted, evaluated, and verified for rice cultivation in Bihar through collaboration of IRRI with Bihar Agricultural University (BAU), Catholic Relief Services (CRS), the Indian Council for Agricultural Research (ICAR), and Rajendra Agricultural University (RAU). The development of CMSTR was made possible through support from the Improved Rice-based Rainfed Agricultural Systems - Bihar, India (IRRAS), funded by the Bill and Melinda Gates Foundation and implemented by Catholic Relief Services (CRS).

RWCM was adapted, evaluated, and verified for rice and wheat cultivation in Bihar through collaboration of IRRI with BAU, the International Maize and Wheat Improvement Center (CIMMYT), ICAR, and RAU. RMCM was adapted for rice and maize cultivation in Bihar through collaboration of IRRI with CIMMYT.

The development of RWCM and RMCM was made possible through support from the Cereal Systems Initiative for South Asia (CSISA), funded by the Bill and Melinda Gates Foundation and the U.S. Agency for International Development and the Sustainable and Resilient Farming Systems Intensification in the Eastern Gangetic Plains (SRFSI) project, funded by the Australian Centre for International Agricultural Research (ACIAR).

For additional information, please contact:

Dr. (Mrs.) Sheetal Sharma
Soil Scientist/Nutrient Management Specialist - South Asia
IRRI-India, NASC complex, DPS Marg,
Pusa, New Delhi-110012, India
Tel: +91 11 66219296 (O), +91 9873417161 (M)

Developed by the
International Rice Research Institute

as a product of research collaboration with

© International Rice Research Institute 2016

Terms and conditions

Crop Manager for Rice-based Systems provides a crop and nutrient management guideline for rice, wheat, and rabi maize grown in irrigated and rainfed environments. The use of this software is subject to the following terms and conditions:

The International Rice Research Institute (IRRI) does not endorse or promote specific agricultural inputs and fertilizers, and it does not guarantee the accuracy of an analysis labeled on commercial agricultural input and fertilizers. The software assumes that the N, P2O5, and K2O analysis labeled on a bag of fertilizer or organic material accurately reflects the content of plant nutrients. Many factors beyond the scope of Crop Manager for Rice-based Systems - such as climate and water availability - affect rice, wheat, and maize yield. IRRI does not guarantee a targeted rice, wheat, and maize yield will be attained with the provided crop management guidelines. The content of the software is subject to change without notice.

Limitation of liability

Under no circumstances and under no legal theory, whether tort, contract, or otherwise, shall the Board of Directors of the International Rice Research Institute (IRRI) or any of its affiliates, officers, employees, or other representatives be liable to you or any other person for any direct, indirect, special, incidental, or consequential damages of any character including, without limitation, damages for loss of goodwill, work stoppage, computer failure or malfunction, or any and all other commercial damages or losses, specifically including damages to crops and soil resulting from the application of the software, or for any damages or liabilities even if IRRI shall have been informed of the possibility of such damages or liabilities, or for any claim by any other party. This limitation of liability shall apply to liability for death or personal injury except to the extent applicable law prohibits such limitation.

Questionnaire forms for using Crop Manager for Rice-based Systems

Questionnaire forms listing all the questions in Crop Manager for Rice-based Systems can be printed in the desired language or dialect and then used for interviewing farmers at remote locations with no internet access.

The information collected with a questionnaire form can then be entered into Crop Manager for Rice-based Systems to obtain a crop management guideline for the interviewed farmer.

Click on a language or dialect below to download questionnaire forms.

Instructions for using Crop Manager for Rice-based Systems

  1. To start, select on a language (Hindi or English). If it is your first time to access the Crop Manager for Rice-based Systems, this will be the first page you see. If not, you can access this with the button, located on the bottom left of the page, then click on Language.
  2. Answer questions for the farmer's field in the order that they appear on the screen. Select an answer from a list of choices by clicking or ticking, or typing the answer into the provided box.
  3. Use the scroll bar on the right side of the questionnaire to go back to a previous question.
  4. After all questions have been answered, click on the button that will appear on the bottom right of the page. If online, a recommendation page with the crop management guideline will be generated. This guideline is based on the answers to the questions. If offline, the user will be asked to save the collected information. The collected information will be saved as a pending input file. When connected to the internet, click on the button, click on the Pending input files folder, and then select the file to generate the recommendation.
  5. The recommendation page typically provides a guideline for an attainable yield level higher than the yield previously attained by the farmer. The yield level is estimated as attainable with good agronomic management practices for the given variety, season, and location.
  6. The recommendation page contains a button. Click on the button to save the recommendation. To see the recommendation, click on the button then the Saved farmer guidelines folder.
  7. After saving the recommendation, the following buttons appear in the output page:
    1. - for printing the recommendation
    2. - for sharing the recommendation as an e-mail
    3. - for downloading the recommendation as pdf. For smartphones, a pdf reader (Adobe Acrobat, Polaris, or Hancom) must be installed to open the downloaded file.
  8. The recommendation page can be printed as follows:
    1. For desktop or laptop computer: Click on the button below the recommendation page.
    2. For smartphone: Connect the phone to a wireless printer. Mobile print app must be installed in the phone for wireless printing. Find the file from the Gallery or File folder and then print.
  9. To start developing a new recommendation, click the button and select Start new session.

© International Rice Research Institute 2016
Select your state:


Note: Use a descriptive name that the farmer can easily associate to the field to be provided with CMRS recommendation. Only 3 to 20 alphanumeric characters can be used for field name.
=    ha

How many kattha in 1 acre?

Is kattha equal to 1 acre?

How many kattha in 1 acre?

Warning: Enter a value not less than
Warning: Enter a value not greater than
If others, please specify:

How will rabi maize be established?

What is the local unit used for yield of maize?

Have you lost yield in your field in the past 5 years to any of the following?

For which upcoming season do you need a recommendation?

What maize variety will you grow for the upcoming rabi season?

Select a submergence-tolerant variety you plan to grow for the upcoming kharif.
The recommendation you receive will be for that variety.
Name of the variety

What is the local unit used for yield of maize?

What rice variety did you grow last year in your field in kharif?
Name of the variety:

from from =    t/ha  (14% MC)

Is life saving irrigation available in your field during a drought?

How was residue from the previous crop managed?

from from =    t/ha  (15.5% MC)

What rice variety was used in the last kharif?
Name of the variety:

How many times do you plan to irrigate the rabi maize crop from establishment to harvest?

How many times do you plan to irrigate the wheat crop from establishment to harvest?

Based on experience in past years, what do you anticipate for the upcoming rabi maize?

Which best describes the soil in your field?
What kind of weeds predominates in your field during the wheat crop?

Was there a problem in recent seasons with sterility of wheat such as chaffy grain?
Did you apply zinc to the previous rice crop?

Which best describes your planned rate of fertilizer application for the upcoming rabi maize crop?

Has a soil test been obtained for the field in the past 2 years?

What was the result for nitrogen (N)?

What was the result for phosphorus (P)?

What was the result for potassium (K)?

What was the result for zinc (Zn)?

What was the result for boron (B)?

Information about the

Given name

Father's name/Mother's name/Husband's name

CSISA Project Farmer ID (optional)


Warning: Select at least one.

Mobile phone number

E-mail (optional)

Information about the person operating Crop Manager for Rice-based Systems

Given Name

Father's name/Mother's name/Husband's name



If others, please specify:

What is your organizational affiliation?

If others, please specify:

Mobile phone number (optional)

E-mail (optional)

Reference number:
Name of farmer:
Field size:
Date generated:
Crop establishment:
Seedling age:
Sowing date:

Note: Use this recommendation for
: (fresh weight),    

Timing DAT
DAP Urea MOP Borax Zn
First irrigation --- --- ---
Second irrigation --- --- ---
After the flood
Active tillering
Panicle initiation
Active tillering
After the flood
Panicle initiation

© International Rice Research Institute 2016  

  • Share the recommendation
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    as e-mail to

    Do you want to save the fertilizer recommendation?

    Note: Once the recommendation has been shared or saved, changes in answers to the questions will no longer be allowed.


The collected information for field of will be deleted. There will be no recommendation to be provided.

  • Start new session
    Would you like to develop a recommendation

You have now successfully ended your session. You may now close this browser window.
Additional question for the farmer

How much fertilizer did you apply to your field in the 2013-2014 crop?

Time of application DAS*/DAT* Name of fertilizer Kilograms
1st application
2nd application
3rd application
4th application
*DAS = days after sowing, DAT = days after transplanting

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