How Much Nitrogen Do Your Livestock Produce Annually in 2026?
Under NVZ rules, the maximum organic nitrogen you can apply from livestock manure is 170 kg/ha per year (averaged over your farm's eligible area). Exceeding this limit risks heavy fines — but many farmers struggle to calculate their exact loading.
This free calculator uses official RB209 2024 nitrogen excretion rates to give you precise annual N output in kg/year. Enter your farm area (ha) for an instant colour-coded kg/ha compliance check.
Key NVZ Nitrogen Limits — 2026
Standard organic N limit
170 kg/ha/year
Derogation (eligible grassland)
250 kg/ha/year
Record-keeping required
Yes — all applications
Exported manure
Deductible with records
Typical Annual N Excretion (kg/head/year)
Dairy cow
~100 kg N / year
Suckler cow
~52 kg N / year
Beef (13–25 months)
~39 kg N / year
Ewe
~9 kg N / year
Example Calculations
- 120 dairy cows on 100 ha → ~12,000 kg N/year → 120 kg/ha (within limit)
- 200 suckler cows + followers on 150 ha → ~12,500 kg N/year → 83 kg/ha
- 2,000 breeding ewes on 120 ha → ~18,000 kg N/year → 150 kg/ha (approaching limit)
Tips for NVZ Compliance
- Calculate accurately — use RB209 figures for your specific livestock types and numbers
- Include all sources — slurry, FYM, poultry manure, and imported manures all count
- Account for exports — deduct manure sent off-farm with proper records
- Spread strategically — apply to fields with the greatest crop need first
- Keep records — this PDF report helps prove compliance at RPA inspections
Frequently Asked Questions
- What counts as the 170 kg/ha limit?
- Only organic nitrogen from livestock manures (slurry, FYM, poultry). Manufactured fertiliser N is separate.
- Do I need to include youngstock?
- Yes — all grazing livestock over 3 months contribute to the loading.
- How is the limit averaged?
- Total organic N produced divided by your farm's eligible area (excluding woodland, hardstanding etc.).
- Can I apply for a derogation?
- Grassland farms meeting strict conditions can apply for 250 kg/ha — check with RPA for eligibility.