Liquid versus granular nitrogen in bread and durum wheat

By Tim McClelland (BCG) and Rob Norton (IPNI)

Key messages:

  • BCG SRR 2014 FRONT AND BACK COVERIn this trial, contrary to expectation, the durum wheat achieved an average yield only 0.1t/ha lower than bread wheat (Scout).
  • During 2014, there was a price differential of between -$83 and $277 for durum (DR1) over bread wheat (H1).
  • The later N is applied in the season, the more it contributes to grain protein.

One of the most common questions asked by producers during the cropping season is: “How much N is lost when fertiliser, particularly urea, is applied and follow-up rain does not occur immediately after application?”

Proponents of fluid N products, such as Urea Ammonium Nitrate (UAN), have suggested that liquid applications can reduce the potential for volatilisation. The perception is that a
large portion of the N, when applied as UAN, is taken up by the crop leaves and that there is a reduced need for follow up rain.

A trial was established at Horsham in the Wimmera in 2014 to assess liquid and granular N products and alternative application methods on crop N uptake in bread and durum wheat.

In this trial the durum and bread wheats, which received identical management, produced similar yields. There was no indication from the results that the durum or bread wheats had different responses to N application methods. This may be a consequence of the very dry finish to the season.

Attachment 8 - BCG SRR 2014 NUTRITION - LIQUID VS GRANULAR_Page_1 Attachment 8 - BCG SRR 2014 NUTRITION - LIQUID VS GRANULAR_Page_2 Attachment 8 - BCG SRR 2014 NUTRITION - LIQUID VS GRANULAR_Page_4 Attachment 8 - BCG SRR 2014 NUTRITION - LIQUID VS GRANULAR_Page_5 Attachment 8 - BCG SRR 2014 NUTRITION - LIQUID VS GRANULAR_Page_6

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About BCG

Birchip Cropping Group Inc. (BCG) is a not-for-profit agricultural research and extension organisation led by farmers in the Victorian Wimmera and Mallee.
This entry was posted in Crop nutrition, Research results and tagged , , , , , , , . Bookmark the permalink.

One Response to Liquid versus granular nitrogen in bread and durum wheat

  1. Pingback: 2014 field trials | The stubble project: Victoria and Tasmania

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