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Extension > Agriculture > Manure Management and Air Quality > Manure Application > Nutrient application rate standards

Nutrient application rate standards

Minnesota Pollution Control Agency

LAND APPLICATION OF MANURE MINIMUM STATE REQUIREMENTS

This information is an excerpt from the MPCA document Land Application of Manure Minimum State Requirements. View complete publication.

Nutrient Application Rate Standards

Maximum manure application rates are limited by crop-available nitrogen on all land. Phosphorus based rate requirements must also be considered in certain sensitive situations as summarized in Table 2 and further discussed on pages 3-5 of the MPCA document Land Application of Manure Minimum State Requirements.

Table 2: Summary of nutrient application rate requirements for manure
Nitrogen (N) a) Cannot exceed crop N needs for non legumes
b) Cannot exceed crop N removal for legumes
Phosphorus (P) a) No long-term soil P build-up near waters
b) Manure management plan with P management strategy required if applying to extremely high P soils and facility is over 300 AU Potassium No restrictions in rule
Potassium No restrictions in rule

On all land receiving manure and/or process wastewater, application rates must be limited so that the estimated plant-available nitrogen from all nitrogen sources does not exceed a) expected crop nitrogen needs for non-legume crops and b) expected nitrogen removal for legumes.

All nitrogen sources to be considered include:

Determinations of crop nitrogen needs, removal rates, and the amount of nitrogen available from manure or legumes must be based on published recommendations of the University of Minnesota Extension or another land grant college in a contiguous state, with the following exceptions:

For most situations, there should not be a need to deviate from University recommendations since the University has already factored uncertainties about the conversion of manure nitrogen to plant-available forms of nitrogen.

To determine University of Minnesota Extension published recommendations for crop nutrient needs, please contact your County Extension Office or call 1-800-876-8636 to obtain a copy of the publication "Fertilizer Recommendations for Agronomic Crops in Minnesota"; BU-6240-E or "Fertilizing Corn in Minnesota"; FO-3790-GO.

To determine maximum manure-application rates, please see the MPCA document "Manure Management Plan Requirements," or the University of Minnesota Extension Publications "Calculating Maximum Manure Application Rates Based on Nitrogen" and "Developing a Manure Management Plan" BU-6957D. Or, use other nutrient planning aids that incorporate University of Minnesota recommendations (or those of a land grant college in a contiguous state).


This information is an excerpt from the MPCA document Land Application of Manure Minimum State Requirements. View complete publication.

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