INMP – Irrigation & Nutrient Management Plan

Para ver esta informacion en espanol, haga clic en la bandera mexicana en la parte superior derecho de la pantalla.

The required “monitoring” period for INMP (Irrigation & Nutrient Management Plan) summary reporting under Ag Order 4.0 has begun for some ranches.  Ranches designated by the Central Coast Water Board as “Phase 1” (click here to view map) under Ag Order 4.0 must file the INMP summary report on the 2023 crop year, no later than March 1st of 2024.  To see if your ranch falls within any of the Phase 1 Areas, log into your ranch eNOI form on GeoTracker and view the “GW Phase Area” number for each ranch: 

In general, the INMP report reflects all information in the existing TNA report, plus Yield (i.e. the nitrogen removed in harvested crop material).

Third Party members must use Preservation, Inc’s reporting tools to submit their INMP summary reports.

Failure to submit a required INMP report may result in enforcement action by the Central Coast Water Board, and/or loss of Third Party membership with Preservation, Inc. Water Board enforcement actions for failure to submit 2022 TNA reports have included fines of approximately $40,000 (link to Water Board press release). 

Section I – Introduction & Checklist

You will need the following information in order to complete the INMP report. You can download this checklist here: INMP Reporting Materials Checklist

Puedes descargar esta lista de verificación aquí: Lista para INMP

  • Preparer Name 
  • Preparer Company 
  • Preparer Email 
  • Preparer Phone Number 
  • Calendar year of INMP data being reported 
  • Ag Waiver (AW) number 
  • Global ID (AGL) number
  • Ranch name
  • Assessor Parcel Number(s) (APN’s) farmed  
  • The total number of acres that were farmed
  • Total number of acres left fallow  
  • Whether or not the ranch is a greenhouse, nursery, or hydroponic operation 
  • All sources of irrigation water (i.e. well versus city versus recycled, etc.)
  • Total volume (in gallons) of irrigation water applied to the entire reported acreage during the reporting period
  • The average nitrate concentration (in mg/L or ppm) of irrigation water applied
  • The average nitrate concentration unit of irrigation water applied
  • Crop(s) you are reporting
  • Total crop acres for selected crop*
    • Crop acres takes into account successions (i.e. if you have 10 acres and you did two successions of lettuce then you will report
      20 acres)
  • Amount of Nitrogen present in soil as pounds of Nitrogen per crop acres (lbs/crop-acre)
  • Pounds of conventional (synthetic) fertilizers and other materials pounds of Nitrogen per crop acre (lbs/crop-acre)
  • Crop Evapotranspiration (Crop-ET) for each crop
  • Pounds of Nitrogen in harvested crop material 
  • Pounds of Nitrogen sequestered in vines/woody plant material (if applicable)
  • Pounds of Nitrogen scavenged by cover crops or high-Carbon amendments (if applicable)

Section II – Recordkeeping & Calculations

If you are not already closely tracking the types and amounts of fertilizers and irrigation water that you apply to each crop, and the amount of harvested crop material, then you will need to do a significant amount of record keeping before preparing your INMP report. 

Once you have all of your fertilizer, irrigation, and harvest records in one place, you will need to convert this information into the total volume of water applied, and the total pounds of Nitrogen applied to and removed at harvest for each crop on each of your ranches for the year. 

Here is a link to the Regional Water Board’s introductory video on INMP reporting. Information on recordkeeping begins at the 3:50 point in the video: 

The following records or calculations are needed to complete the INMP report. Where available, we have provided links to recordkeeping and/or calculator tools. Preservation, Inc.’s TNA/INMP Calculator Tool can help with your conversions, record keeping, and data reporting. Use of these tools is not required, but they may be helpful if you do not already have a system in place:

  1. Volume of irrigation water applied, in gallons. Ag Order 4.0 requires that this be measured (not estimated).
    • Flow meters are the most common tool for measuring water application
    • Unit conversions – if you know the acre-feet or inches applied, you can convert to gallons (link to conversion tool)
    • If you did not measure the irrigation volume in 2023, you should estimate this information in order to complete the INMP report for 2023 crops. You should also prepare to measure irrigation water in 2024.
  2. Pounds of N in irrigation water 
  3. Soil nitrogen content from soil test
  4. Pounds of N applied in fertilizer
  5. C:N ratio
    • Finding this information
  6. Organic versus synthetic/conventional
  7. Crop Evapotranspiration (Crop ET)  

*There are two options to calculate ET:

A. For single crop applications – 

    1. Click Link to ET calculator
    2. Select commodity from drop-down menu
    3. Select more specific crop type from secondary drop-down menu
    4. Enter or select from calendar the start and end dates for your crop
    5. Use map to zoom to your location and click on or near your field of interest (this will allow the calculator to use the nearest CIMIS Station for weather data)

B. For multiple crops and plantings, Preservation, Inc. ET Calculator – 

  1. Download the MS Excel file
  2. Read the Instructions tab to learn how to correctly populate the CropETc_Input tab
  3. Populate the CropETc_Input tab for all crops and plantings
  4. Submit the saved file through the online ET Calculator
    – You will receive an email within 5-10 minutes containing an Excel file with the calculated ET output
    – If any records do not have a calculated output, read the Notes tab for troubleshooting tips

Section III – Submit a Report

To Submit Your Report:

  • Asistencia en espanol – Llame a 831-240-9533 o escriba a Haga clic para INMP-EZ Form en Espanol.
  • If you are not comfortable using computers or Excel spreadsheets, call 831-240-9533 
  • Operations that grew five or fewer crops per ranch in 2023 may use Preservation, Inc’s new INMP-EZ Form for those ranches
  • All others please download the INMP Reporting “Spreadsheet Form” below
    • Contact the Support Line with basic questions (phone number and email above)
    • For advanced technical support, contact Marco Sigala at
  • If you used the Spreadsheet Form to submit your TNA report last year, you can use that saved file to help start your INMP report this year, but you will need to copy and “paste values” into the new INMP Spreadsheet Form and complete the additional required information.

The Preservation, Inc. Irrigation & Nutrient Management Plan (INMP) Reporting Spreadsheet Form

The information required in the Preservation, Inc. INMP report Spreadsheet Form (an MS Excel file) is identical to the information required by the GeoTracker INMP web-form and the INMP-EZ Form.  The layout is different, to support rapid data entry for growers and service providers who:

  • Need to report on large numbers of ranches and/or crops; AND
  • Already have systems in place to calculate the final values required for the report

If you use the Preservation, Inc. INMP report Spreadsheet Template to file your report this year you can use that saved file as a starting point for next year’s report. 

How To Submit an INMP Report

  • Please upload your completed report to Preservation, Inc’s INMP Submittal Site
  • If you experience any problems uploading your report to the above-linked page, please email it as an attachment to:

If you are not comfortable using computers or Excel spreadsheets, call 831-240-9533.

Compliance Consultants for Additional Help Completing or Revising INMP Reports:

Danilu Jelderks (Ramirez) – 805-363-0761
Heather Golden – 831-320-8698
Katie Teresi – 831-207-1215 
Karla Cornelio, UCCE-Santa Clara County – 408-201-0652
Sasha Lozano, Santa Cruz County Resource Conservation District – (831) 464-2950
Laura Murphy, Monterey County Resource Conservation District – (831)975-7775

Section IV – INMP Exemption Request Form

If you apply 50 pounds of N/acre/year or less to your crops, you may be eligible for an exemption from INMP reporting, based on already meeting the final Target in Ag Order 4.0, regardless of how much N is removed from your fields at harvest.  If you qualify, you can continue to report only the TNA information, instead of INMP.  Fill out the form below to be placed on our group exemption request list.

Contact Info

  • PO Box 2227
    Watsonville, CA 95077
  • 831-761-8644 (phone)
  • 831-761-8695 (fax)
For a full list of contacts please
visit our contact page.

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Member Workshops

Preservation, Inc. held four combined Third-Party Membership and TNA/INMP reporting workshops in November of 2023 (two in English and two in Spanish), with information on upcoming 2024 Third-Party ...
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