N-Boost® Pasture Trials

Since 2008, there have been over 280 N-Boost® pasture and crop trials conducted by over 40 independent universities and organisations.

Donaghys N-Boost® is the original scientifcally proven and trusted Donaghys LessN® with the same ingredients and method of application. All pdf documents with trial results on this website will refer to the N-Boost® System as LessN, LessN 40 or the LessN System.

Trial Summaries

Summary tables of all trial results can be viewed in the PDF documents below.

All Trials
Donaghys Trials
Independent Trials
Extended Trials
No Nitrogen Response Trials

Pasture Trials

To date, 67 trials nationwide have been conducted on a mixture of dryland and irrigated clover based pasture, making it the largest nitrogen response study on pasture in New Zealand since 1981. The trial periods ranged from 15 to 187 days with the average length of most trials being 25 days.
Over 100,000 individual pasture measurements were taken. Of the total trials conducted, 7 trials did not show a nitrogen response to urea application and a further 7 were not conducted in accordance with Donaghys recommendations (i.e. off-label).

The results from the remaining 53 nitrogen responsive trials conducted in accordance with Donaghys recommendations can be shown in the table below.

The trial results show an average nitrogen response rate of 24.35kg of dry matter per kg applied when using the N-Boost® System (3L/ha N-Boost® + 40kg/ha urea) compared to 10kg of dry matter per kg of nitrogen applied when using only 40kg/ha urea. In trials using 80kg/ha spread urea, the average nitrogen response was 12kg of dry matter per kg of nitrogen applied.

Extended Pasture Trials

Nine extended trials were conducted past one grazing round (average of 49 days) to assess the residual effect of N-Boost®. Five of these trials were independent and four were in-house. Extended trials proved that the residual effect of the N-Boost® System is similar to an application of solid urea at 80kg/ha.

One trial was also conducted throughout an entire milking season (seven grazing rotations). Treatments were reapplied before grazing three and grazing six. The treatment with N-Boost® grew similar amounts of pasture to the treatment with 80kg spread urea.

Donaghys N-Boost® is the original scientifcally proven and trusted Donaghys LessN® with the same ingredients and method of application.