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Livestock Nitrogen Loading Calculator

Annual N output · RB209 2024 · NVZ 170 kg/ha compliance

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Livestock TypeHeadWeekly N
(kg/head)		Annual N / Head
(kg/year)		Total Annual N
(kg/year)
0.0000.00
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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

  1. Calculate accurately — use RB209 figures for your specific livestock types and numbers
  2. Include all sources — slurry, FYM, poultry manure, and imported manures all count
  3. Account for exports — deduct manure sent off-farm with proper records
  4. Spread strategically — apply to fields with the greatest crop need first
  5. 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.