What Are Nutrient Units?
A nutrient unit is a standardized measurement used under Ontario's Nutrient Management Act to determine the regulatory requirements for your farm. One nutrient unit is the amount of nutrients that would be generated by the equivalent of one 455 kg (1,000 lb) beef animal.
Example Livestock Conversions
Livestock Type
Approx. Animals per Nutrient Unit
Dairy Cow
~1 cow
Beef Feeder
~2.5 animals
Sow (farrow-to-finish)
~3 sows
Broiler Chickens
~300 birds
Laying Hens
~150 birds
Turkeys
~150 birds
Note: These are approximations. Actual nutrient unit calculations depend on specific animal weights, housing types, and management practices.
The 300 Nutrient Unit Threshold
At 300 nutrient units or more, your farm will typically require both a Nutrient Management Strategy (NMS) and a Nutrient Management Plan (NMP).
Not Sure About Your Nutrient Units?
We can calculate this for you as part of a free consultation.
Frequently Asked Questions
Do I need an NMS to build a barn in Ontario? In most cases, yes — if you are increasing livestock or nutrient storage capacity, you will likely need a Nutrient Management Strategy (NMS) before construction can begin.
What are nutrient units? A nutrient unit is a measurement used under Ontario's Nutrient Management Act to determine the regulatory requirements for your farm. It's based on the type and number of livestock you have.
When do I need both an NMS and an NMP? Typically when your farm operation exceeds 300 nutrient units, you'll need both a Nutrient Management Strategy (NMS) for storage and expansion, and a Nutrient Management Plan (NMP) for land application of nutrients.
How long does approval take? Approval timelines vary depending on the complexity of your operation. Most plans take several weeks from farm visit to final approval. Starting early is critical — delays can cost you a full growing season.