The Netherlands is New Zealand's fourth largest trading partner in the EU, and Fonterra has its European headquarters in Amsterdam.
"They along with the Germans are going to be quite influential in terms of New Zealand completing that FTA. Because I think while their farmers might be supportive, we're likely to run into resistance potentially, particularly from French farmers are the likes."
Earlier today, King Willem-Alexander and Queen Maxima were given a ceremonial welcome at Government House in Wellington, before laying a wreath at Pukeahu National War Memorial Park and visiting the Great War exhibition.
This afternoon they visited Park Road Post Production, the Wellington company that helped make the Lord of the Rings and Hobbit movies.
Built in 2002 by Sir Peter Jackson and part of the Weta Group of companies, Park Road includes digital daily services, off-line edit suites, sound design, sound mixing and VFX.
A 51-strong business and trade delegation is accompanying the King and Queen.
The visit is the first in an official capacity by the royals - they honeymooned here in 2002. About 150,000 thousand people of Dutch descent live in New Zealand.