PAN Calculator

Plant Available Nitrogen (PAN) method must be used by concentrated animal feeding operations (CAFOs) to determine the nitrogen fertilizer value of manure. Manure application rates for a field is calculated using the PAN estimate and a target fertilizer nitrogen rate for a field.

The calculations used by this calculator are detailed in MU Guide G9186 “Calculating Plant-Available Nitrogen and Residual Nitrogen Value in Manure.”  Contact John Lory if you have questions or comments.

To calculate PAN you need to have an estimate of manure nutrient concentration, information on the type of animals, information on use of bedding and information on the method of manure application. Enter the requested information to determine PAN for a source of manure.

Facility ID Entry (optional)

Operation Name

Manure Storage ID

Planner Name

Planner Email

Manure Test Data Entry

Animal Type {{label}}

Manure Test Basis

{{label}}

Manure solids reported as

Percent Moisture Content (MC) Percent Dry Matter (DM) or Percent Solids

Percent value (required)(optional)

Manure Form {{label}}

Manure Test Units (liquid manure) {{label}}

Manure Test Units (solid manure) {{label}}

Total N or Total Kjeldahl N (TKN)

{{reportUnitsLabel}}

Nitrogen

Type

Ammonium or NH₃-N Organic N

Value

{{reportUnitsLabel}}

Nitrate N (typically assume 0)

{{reportUnitsLabel}}

Phosphorous

Type

Phosphate (P₂0₅) Elemental P

Value

{{reportUnitsLabel}}

Potassium

Type

Potash (K₂O) Elemental K

Value

{{reportUnitsLabel}}

Manure Application Information

Manure Application Equipment {{label}}

Days to Incorporation {{item.label}}

Target crop fertilizer N rate (pounds per acre)

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Plant Available Nitrogen Calculator
Results Report

4/26/2024
Ver. 0.7

Operation Information

Operation Name: {{facility.name}}

Manure Storage ID: {{facility.storageId}}

Planner Name: {{facility.plannerName}}

Planner email: {{facility.plannerEmail}}

Converted Manure Test Results - As-is Basis

Total Nitrogen:	{{nutrientsCalc.totalN | roundToDecimalPlaces( 1 ) }} {{resultUnitsLabel}}
Organic Nitrogen:	{{nutrientsCalc.orgN | roundToDecimalPlaces( 1 ) }} {{resultUnitsLabel}}
Ammonium Nitrogen:	{{nutrientsCalc.ammN | roundToDecimalPlaces( 1 ) }} {{resultUnitsLabel}}
Nitrate Nitrogen:	{{nutrientsCalc.nitrateN | roundToDecimalPlaces( 1 ) }} {{resultUnitsLabel}}
Phosphate:	{{nutrientsCalc.p | roundToDecimalPlaces( 1 ) }} {{resultUnitsLabel}}
Potash:	{{nutrientsCalc.k | roundToDecimalPlaces( 1 ) }} {{resultUnitsLabel}}
Manure Test Basis:
Moisture Content:	{{moistureContent}}%

Manure Application Information

,

Manure Application Equipment:

Days to Incorporation:

Plant Available Nitrogen (PAN)

PAN: {{ pan | roundToDecimalPlaces( 2 ) }} {{resultUnitsLabel }}

Residual Nitrogen Fertilizer Value (RNFV): {{ rnfv | roundToDecimalPlaces( 2 ) }} {{resultUnitsLabel}}

Availability factors used:

• k₁(Y1), organic N, year 1: {{k1y1}}
• k₁(Y2), organic N, year 2: {{k1y2}}
• k₂(NH₄), ammonium N: {{k2nh4}}
• k₂(NO₃), Nitrate N: 1.0

Recommended Manure Application Rate

Target Fertilizer N Rate:	{{targetNRate}} lbs/acre
Manure Application Rate:	{{ manureRate | roundToDecimalPlaces( 2 ) }} {{appRateUnitsLabel}}
Phosphate Applied:	{{ pApplied | roundToDecimalPlaces( 0 ) }} lbs/acre
Potash Applied:	{{ kApplied | roundToDecimalPlaces( 0 ) }} lbs/acre
Year 2 residual fertilizer N value:	{{ nResidual | roundToDecimalPlaces( 0 ) }} lbs/acre

If you have questions about this report contact John Lory. These calculations are based on MU Guide G9186, Calculating Plant-Available Nitrogen and Residual Nitrogen Fertilizer Value in Manure.

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