By Tim McClelland (BCG) and Rob Norton (IPNI)
- In 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.