Evaluation of late nitrogen applications to achieve yield potential and increased protein content in wheat

In the southeastern Australian high rainfall cropping zone, growers have the opportunity to apply nitrogen later in crop growth because of the higher probability of followup rains. This project established eight field experiments to help growers refine N source, rate and time for this region.


This project aims to contribute to the knowledge gaps identified by the HRZ RCSN in the program logic for the very high priority issue of nitrogen management. The research question is – Can we achieve optimum yield (measured at 10. Read more

Year of initiation:2013
Year of completion:2014


03 Mar 2016

Time for an N-Rich Strip
Reference strips to check on N response

25 Aug 2014

Nitrogen - how much is enough?
GRDC Grower Updates, Kimba, Cummins, Naracoorte

03 Jul 2014

How to get nitrogen into your crop effectively and efficiently
Time, Rate, Place and Source - get them all Right.

03 Jul 2014

Late N application on wheat - yield and protein
Results from 8 field experiments in the high rainfall zone during 2013.

Interpretive Summary


Nitrogen timing, application rate, and fertilizer form are key management decisions for growers every season. In the high rainfall zone, low grain protein usually indicates that N management has limited crop yields. Eight farmer wheat paddocks were selected and 3 N sources (i. e. , granular urea, liquid urea, UAN) were applied at either 25 or 50 kg N/ha during either stem elongation, flag leaf, head emergence, or at the end of anthesis.

Updates & Reports


Project Summary


Project Description

Project Leader

Jon Midwood, Southern Farming Systems

Project Cooperators


IPNI Staff

R. M. Norton


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

Oceania \ Australia and New Zealand \ AUS \ New South Wales \ Southeast New South Wales


4r rate, 4r source, 4r time, broadcast fertilizer, foliar fertilization, nutrient use efficiency


Nitrogen (N)