Laura Dorman Debbie Gillam Chris Pinkney Craig Topham
Year(s)
2015
Contributor
Mingenew-Irwin Group
Trial location(s)
Mingenew, WA
Morawa, WA
Ogilvie, WA
Tenindewa, WA
Aims
To build an understanding of the current nitrogen use efficiency of four soil types in the Northern Agricultural Region of WA
To understand how efficiently applied nitrogen is used in the soil.
To educate growers and advisors on how to improve nitrogen use efficiency through a greater understanding of the soil water interactions and use this information to reduce production risk.
Key messages
With the current climate trending to decreased seasonal rainfall, each 1% increase in productivity is important.
Increases in productivity can come from increased yield, more efficient application of inputs, or more timely grain marketing.
Knowledge on the soil water holding properties, the time when the crop is taking up the most water from the soil and the current yield estimation models allows growers to market grain with more confidence pre harvest.
Tools such as Yield Prophet, iPaddock Yield, soil moisture Probes and water use efficiency models are all very useful in assisting to predict grain yields with a relatively high level of confidence when accurately set up.
In this project “iPaddock Yield” provided the greatest level of accuracy in predicting final grain yield on July 31st 2015. The simple French & Shultz “Broken Stick” model was very close to the accuracy of the ipaddock Yield at 77% & 74% accuracy.
When there is confidence in the early to mid-season yield prediction combined with accurate soil Nitrogen testing and modeling, there is a greater chance of maximizing profits from applied nitrogen.
Trial source data and summary not available Check the trial
report PDF for trial results.
Climate
Derived climate information
No observed climate data available for this trial. Derived climate data is
determined from trial site location and national weather sources.
Mingenew WA
Morawa WA
Ogilvie WA
Tenindewa WA
Mingenew WA
CAUTION: Trial site locality unknown; Climate data sourced from Mingenew-Irwin Group office location
Morawa WA
Ogilvie WA
NOTE: Exact trial site locality unknown - Climate data may not be accurate
Tenindewa WA
NOTE: Exact trial site locality unknown - Climate data may not be accurate
SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
Jeffrey, S.J., Carter, J.O., Moodie, K.B. and Beswick, A.R. (2001). Using spatial interpolation to
construct a comprehensive archive of Australian climate data , Environmental Modelling and Software, Vol
16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.
