The Dalrymples' Waitatapia Station has had consent for intensive farming since 2012. The amount of nitrogen they can leach was set in that year. It was a drought year and they were grazing stock for other farmers because they could irrigate.
Mr Dalrymple would not say how much they were leaching, but said the number of kilos per hectare was high.
They have been expected to reduce their leaching since, and he thought those reductions would be starting to show now, if trends were mapped. But they haven't had lysimeters working to measure it.
The Dalrymples are among about 220 farmers who have yet to get consent from Horizons for their intensive farming.
Environment groups Fish & Game and the Environmental Defence Society took Horizons to the Environment Court earlier this year. The court said the way Horizons was issuing consents for intensive farming was unlawful and ordered it to stick to the nitrogen leaching limits set out in its One Plan.
When the court's declarations were made, Horizons had already granted 221 dairy consents for intensive farming and two horticulture ones. It had 44 consents being processed as well.
Most of those applications were then withdrawn, or sent back to the applicants because they were incomplete.
Horizons must now decide how to change its consent process in reaction to the declarations. Because of that, farmers were feeling uncertain about where they would be in five or 10 years' time, Mr Dalrymple said
"Everyone is worrying about it. We are working with Horizons to try to come up with some solutions."
The council expects to have decisions made by August. It will then have another 180 dairy consents (mostly in Tararua) to process, plus 20 horticulture ones (mostly in Horowhenua) and 15 cropping ones (mostly in Manawatu and Rangitikei).
Mr Dalrymple said farmers watching this situation would delay applying for consent.
"You delay as long as you can, because who wants to spend money if you don't have to?"
To him the environment groups are "extremists", and he had been told the Overseer computer programme, the scientists and lysimeters may not be accurate. He said Horizons was doing "a magnificent job".
"I don't think Horizons are wanting to shut anyone down. They're pushing everyone in the right direction, which is great."