Farmers are looking to "turn things on their head" by challenging environmental assumptions about their sector at a water forum tomorrow.

In a hard-hitting public statement, Spierings described media comments by the Feds as "disappointing", "inaccurate" and "puzzling".

The New Zealand dairy herd has grown by more than 250,000 in less that two years, says new research published today.

Prices have plunged overnight in the latest world dairy auction, falling to below the 10-year average for the first time since 2009.

It's all about speed, says chief executive Theo Spierings