Episode 106 - Real data shows real costs
A deep dive into the data on substitution rates based on real measurements reveals just how careful farmers need to be when it comes to budgeting on the returns from supplementary feeding. The Prime Minister’s Chief Science Advisor Dr John Roche shared his analysis at a Taranaki Pasture Summit field day in late 2025 and in this podcast episode he steps listeners through his findings, explaining substitution rates and the concept of marginal milk. Drawing on extensive research and practical examples, he outlines why more feed does not always translate to more profit, and how important it…
The skinny
The skinny isn't ready yet — notes appear once the transcript is processed.