Foliar N on Wheat

Comparison of delivery of N through dry or fluid N sources


Background: Fertiliser inputs represent a significant proportion of total variable costs in grain production. A common question that arises in the cropping season is how much nitrogen is lost when fertiliser is applied and follow-up rain does not occur immediately after application? Growers relate to this because they recognise the link between volatilisation and the effect this has on reducing the amount of nitrogen available to their crop and the consequent ‘waste of money’. Read more

Year of initiation:2013
Year of completion:2014


10 Mar 2014

To spray or to spread: Quantifying UAN leaf N uptake
Report on a comparison in the Victorian Mallee

05 Feb 2014

Getting Nitrogen into the crop - efficiently and effectively
Presented at GRDC Ballarat Advisor Update Feb 06, 2014, and the SANTFA Annual Conference, February 21, 2014.

Interpretive Summary


A common question that arises from growers is about the best N source to apply to cereals and canola in-season. To address this, a field experiment was established at Birchip, Victoria to assess the relative efficiency of UAN, liquid urea and granular urea, particularly when rain does or does not occur. Comparisons were also made between streaming and hollow-cone nozzles for the application of fluid N sources.

Updates & Reports


2013 Annual Report


Summary of BCG field trial


Foliar N on wheat

Droplet on a wheat leaf

Project Leader

Tim McClelland, Birchip Cropping Group

Project Cooperators

Rob Launder

IPNI Staff

R. M. Norton


Oceania \ Australia and New Zealand \ AUS \ Victoria \ Mallee


4r source, 4r time, foliar fertilization, nutrient management

prune, wheat

Nitrogen (N)