INMP Worksheet Resources (Coalition Members)

Irrigation & Nitrogen Management Plan (INMP) Worksheet Resources

Use this page to find tools and references organized by INMP Worksheet box number. Remember: the INMP Worksheet stays on-farm, while the INMP Summary Report is what you submit to your coalition each year.

SSJV MPEP Website Jump to Boxes 9A–14
Workflow Worksheet (keep) → Summary (submit)
Management Units Max 640 acres
Columns A = Plan, B = Actuals
Units Report per acre

Step 1: Define Management Units & Field Info

Management Unit (MU)

Group fields (≤ 640 acres) with the same crop, irrigation, and nitrogen management.
  • Keep a clear MU/Field ID that matches what you report in your Summary Report.

Step 2: Irrigation Management (Boxes 2–4)

Box 2 — Crop Evapotranspiration (ET)

Estimate seasonal crop water needs.

Box 3 — Anticipated Irrigation (inches)

Planned applied water (account for ET, rainfall, leaching, and efficiency).
  • Document how you accounted for: crop demand, effective rainfall, leaching requirement, and irrigation efficiency.
  • Use the same assumptions consistently within a management unit.

Box 4 — Irrigation Water N Concentration

Lab results may report nitrate as NO3 or NO3-N (different units).
  • Confirm the unit on the lab report before converting.
  • See Box 10A for the calculator and certified lab list.

Step 3: Yield Targets (Boxes 6A–7A)

Box 6A — Production Unit

Define yield units clearly (e.g., dry tons, lbs, bins with a defined weight).
  • If using bins/lugs, document the weight per container.

Box 7A — Expected Harvested Yield

Use realistic history (often 3–5 year average; omit outliers).

Step 4: Nitrogen Budget (Boxes 9A–14)

Box 9A — Soil Available N

Soil sampling guidance (keep sample notes and results with your worksheet).

Box 10A — Nitrogen in Irrigation Water

Convert water N concentration + applied inches into lbs N/ac.

Box 11A — Organic Amendments

Estimate plant-available N from compost/manure products.

Box 12A — Dry/Liquid Fertilizer N

Convert fertilizer grade and rate to lbs N/ac.

Box 13A — Foliar Fertilizer N

Include foliar nitrogen as an N input source.

Box 14 — Total Nitrogen Budget

Sum all N sources and keep Plan (A) vs Actual (B) clear.
  • Total N includes irrigation water N and organic amendments (not only fertilizer).
  • Keep entries consistent as lbs N per acre.

Efficiency: Applied vs Removed (A/R)

What A/R Uses

A/R compares nitrogen applied to nitrogen removed by harvested crop.
  • Applied (A): irrigation water N, organic amendments, fertilizers.
  • Removed (R): actual yield × crop N removal factor.

Optional A/R Tool

Helpful for internal review and identifying trends.

Certification & Recordkeeping

When Certification Applies

Certification may be required based on parcel vulnerability/outlier status.
  • Self-certification pathway (training + exam), or specialist certification.
  • Check coalition guidance for your specific eligibility.

Keep for Inspection

Maintain supporting documents with your on-farm worksheet.
  • Keep lab results, calculations, and application records with the worksheet.
  • Submit the Summary Report by your coalition deadline.

Help & Trainings

CropManage

Set up your account before hands-on support sessions.

CDFA Training

Training and continuing education (for self-certification pathways).
Reminder: Keep the worksheet and supporting records on-farm; submit the Summary Report per coalition deadlines.