The Rotorua Land Innovation Challenge organisers have received five expressions of interest - but believe there will be far wider interest ahead of the close-off date.
The challenge aims to generate additional land uses for the Lake Rotorua catchment as part of efforts to clean up the lake water quality.
It is hoped the event will generate ideas for land owners who are required to reduce nutrient loss.
Entries to the challenge, which has a $20,000 top prize, close on March 31.
So far the five expressions of interest had been officially received by the Bay of Plenty Regional Council but because that isn't mandatory, it's not indicative of the number of entries.