Trial Results

: Click here for summary table (pdf)

To date, 67 trials nationwide have been conducted on a mixture of dryland and irrigated clover based pasture.

The trial periods ranged from 15 to 58 days with an average length of 25 days
Over 100,000 individual pasture measurements were taken
Of the total trials conducted, seven trials did not show a N response to urea application and seven were not conducted in accordance with Donaghys recommendations (i.e. off-label)

Trial Summary Tables

All Trials with a N Response
Independent Trials
Donaghys Trials
Extended Trials
No N Response and Off-Label Trials

Peer Review Reports

AsureQuality Peer Review
This AsureQuality report reviews the New Zealand field trials conducted by Donaghys to evaluate pasture responses to the application of LessN in association with urea by AsureQuality. This report considers the design, conduction of the field trials, analysis and reporting of results.

Independent Peer Reviews
Donaghys have also commissioned peer reviews of all LessN trials by two leading independent statisticians. These are currently being finalised and will be published on this website soon.

FQC Peer Review Report
This Fertiliser Quality Council report is a report of the Expert Panel on the trial programme conducted by Donaghys to support their claims regarding the agronomic performance of LessN.

Summer 2010/2011 Trials

Mid Canterbury Part 1 2010-11		Waikato Summer 2011
Mid Canterbury Part 2 2011

Autumn 2010 trials

Donaghys - Clinton

Donaghys - Ranfurly

Summer 2009/10 trials

Donaghys - Leeston

Autumn 2009 trials

Donaghys - Culverden 2		Donaghys - Lake Taupo 1
Donaghys - Dargaville		Donaghys - Lake Taupo 2
Donaghys - Dunsandel 2		Donaghys - Waitaki
Donaghys - Dunsandel 3		Donaghys - Whangarei
Donaghys - Dunsandel 4		Donaghys - Rolleston

Summer 2008/09 trials

Donaghys - Culverden		Donaghys - West Coast 1
Donaghys - Dunsandel		Donaghys - West Coast 2
Donaghys - North Canterbury		Donaghys - West Coast 3

Spring 2008 trials

Donaghys - Castlerock		Donaghys - Rakaia
Donaghys - Eyrewell		Donaghys - Rangiora
Donaghys - Foxton		Donaghys - Riversdale
Donaghys - Irwell		Donaghys - Tauranga
Donaghys - Kaitaia		Donaghys - Temuka
Donaghys - New Plymouth		Donaghys - West Eyreton
Donaghys - Oxford

Summer 2007/08 trials

Donaghys - Ashburton		Donaghys - Rakaia
Donaghys - Burnham		Donaghys - Tai Tapu
Donaghys - Darfield		Independent - Canterbury

Spring 2007 trials

Independent - Waikato (Dry)

Autumn 2007 trials

Independent - Aylesbury 1		Independent - Darfield 2
Independent - Aylesbury 2		Independent - Springfield
Independent - Darfield 1		Independent - Woodend

No Nitrogen Response Trials

Independent Waikato		Independent Northland 2
Independent Rangiora		Independent Hinds
Independent Jordan Valley Northland		Independent Matamata
Independent Tirau

Non-Representative Trial Reports

Independent - Northland		Independent - Pankhurst
Independant - Reporoa		Independent - Dairy
Independent - Waikato		Independent - Sheep
Independent - Winchmore