P is for profit and for phosphorus Part 1: Why feed phosphorus to cattle in northern Australia?

Phosphorus (P) deficiency can have a major impact on animal health, fertility and performance, frequently resulting in lost profit on beef enterprises in Northern Australia.

In this webinar recording, Mick Sullivan (Principal Beef Extension Officer, DAF Rockhampton) takes an in-depth look at how you can determine if phosphorus is an issue for your business and what can be done about it.

During the presentation, Mick discusses the following topics:

  • why cattle need phosphorus
  • identifying a phosphorus deficiency
  • correcting the deficiency.

You can watch the full recording or use the playlist below to jump to the start of a particular section within the presentation.  21:16; published 28 May 2020 by FutureBeefAu.


  1. Why feed phosphorus
  2. Outline
  3. Why Phosphorus (P)?
  4. Practical management of nutrition
  5. Phosphorus deficiency
  6. Identifying a P deficiency
  7. Knowing your land types is important (FORAGE reports)
  8. Soil P – what is low?
  9. Animal P tests
  10. Testing breeder paddocks
  11. When to test cattle for P deficiency
  12. Faecal P analysis
  13. Phosphorus supplementation
  14. Wet season and dry season considerations
  15. How much phosphorus?
  16. How to feed phosphorus
  17. Lick composition
  18. Supplement selection
  19. Managing supplements.

Download a copy of the presentation – Why feed phosphorus (PDF, 1.75 MB).

The second presentation in this webinar by Tim Schatz (Northern Territory Department of Industry, Tourism and Trade) is listed below under additional resources.

Additional resources

← P is for profit and phosphorus Part 2: Kidman Springs P study and future research

← Phosphorus supplementation of cattle in northern Australia

← Improving beef business performance with phosphorus supplementation

← New phosphorus nutrition tools available online

FORAGE reports visit the Long Paddock website →