The minister wants a rethink on aid after adverse weather events, which were happening more often and hitting harder.
It obtained a private ruling from Inland Revenue last year.
The GDT Price Index decreased just 0.1% to US$3,393 (NZ$5,280) per metric tonne.
The Karaka Million this Saturday will serve as a curtain-raiser to this year's sales.
Journalist
Followers will be emailed
articles by Riley