Trial Results

: Click here for summary table (pdf)

To date, 67 trials nationwide have been conducted on a mixture of dry and irrigated land, on clover based pasture over periods ranging from 15 to 58 days.

Average trial length was 25 days
Over 100,000 individual pasture measurements
12 trials did not show a nitrogen response
All trials replicated to take into account variations between trial plots.

Summary table - All trials (pdf)
Summary table - Independent trials (pdf)
Summary table - Donaghys trials (pdf)
Summary table - Extended trials (pdf)
Summary table - No Nitrogen Response trials (pdf)

Latest Independent Trials

Mid Canterbury Part 1 2010-11

Mid Canterbury Part 2 2011

Waikato Autumn 2011

Autumn 2010 trials

Donaghys - Clinton

Donaghys - Ranfurly

Summer 2009/10 trials

Donaghys - Leeston (Spread vs Spray)

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 (Spread vs Spray)

Summer 2008/09 trials

Donaghys - Culverden		Donaghys - West Coast 1
Donaghys - Dunsandel		Donaghys - West Coast 2
Donaghys - North Canterbury (Spread vs Spray)		Donaghys - West Coast 3

UK University Trial - June/July 2009

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 - Dairy		Independent - Waikato
Independent - Sheep		Independent - Winchmore
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