Iwan Vaughan: Report published

2017 Scholar, Iwan Vaughan’s report is now available on the Nuffield International website. Below is the executive summary of his report, titled:‘Sustainable protein feeding for the UK dairy industry’

Report Title       

Sustainable protein feeding for the UK dairy industry


Iwan Vaughan


Royal Welsh Agricultural Society and McDonald’s Restaurants

Countries visited

USA, Canada, Netherlands, Ireland, Dubai, Australia, New Zealand and Ireland

Objectives of the study tour: 

  • To reduce ammonia emissions from dairy production through feeding less N
  • Increasing N utilisation within the rumen
  • To reduce the need for purchased protein inputs
  • To increase cow health, fertility and production


  • Ammonia emissions can be reduced through low crude protein diets.
  • Industry needs to get away from formulated to crude protein.
  • Need a more accurate feed analysis for UK forages, and model the diet correctly.
  • Increase feed efficiency for environmental sustainability.
  • Realise the potential DM yield of your farm before purchasing more feed.


See Iwan’s report at: