| Researcher(s) |
Nicole Dimos (SPAA) Neil McMillan (FSG) James Mwendwa (CWFS) Leighton Wilksch (SPAA) |
|---|---|
| Year(s) | 2011 |
| Contributor | Society of Precision Agriculture Australia |
| Trial location(s) |
Nyngan , NSW
|
In 2010, at Wass brothers’ property in Nyngan, a very wet season caused the normally poor performing areas to perform just as well as the good areas in this paddock regardless of additional nitrogen application. In other paddocks across the farm, there were significant yield differences across each paddock. However, in the previous years Wass’s have always wanted to apply N and have had mixed results possibly because of soil and water variability. Most seasons they have areas that burnout and areas which could use a higher application of N and give a better yield. In 2011, Hayden intended to try to understand what was driving these differences, and yield maps are a way of spatially determining different zones. Therefore, this trial was set up.
| Lead research organisation |
Society of Precision Agriculture Australia |
|---|---|
| Host research organisation | N/A |
| Trial funding source | GRDC SPA000010 |
| Related program | N/A |
| Acknowledgments |
“The Soaks” property owners Dion, Bert Barb Woolford. Paddock and trial sown by Dion Woolford. Tim Moyle Landmark Kimba pegged trials and applied urea. Linden Masters MAC monitored plots and interpreted results. Leigh Davis and Brenton Spriggs SARDI reapt plots. Trials coordinator and FSG contact is Linden Masters |
| Other trial partners | Incitec Pivot (Soil Tests). Wass Brothers PTY LTD Nyngan (Growers). |
| Crop type | Cereal (Grain): Wheat |
|---|---|
| Treatment type(s) |
|
| Trial type | Precision agriculture |
| Trial design | Not applicable |
| Sow rate or Target density | 50kg/ha |
|---|---|
| Sow date | 30 May 2011 End of May |
| Harvest date | 3 November 2011 3 November 2011 |
| Plot size | 2m x 20m |
| Plot replication | Not specified |
| Fertiliser |
Easy N 60L/Ha in 5 x 36m test strips, 250kg Urea/Ha in 2m x 5m plots. |
| Other trial notes |
There was only 100kg/ha more from the N strips compared with the control. The grain protein was 11.8% for the control compared with 12.8% for the N strips, which is an increase of 1%. This was not enough for the grain to sell at higher grade and therefore there was no economic gain. It was break even if not factoring labour costs. |
| # |
Treatment 1
|
Treatment 2
|
Protein (%) | Screenings (%) | Grain yield (t/ha) | Moisture (%) | Test weight (kg/hL) | Plant available water (mm) |
|---|---|---|---|---|---|---|---|---|
| 1 | █ Depth 0-15 cm | █ Sandy loam | 10.4 | 13.1 | 1.71 | 11.3 | 66.4 | 18.96 |
| 1 | █ Depth 15-30 cm | █ Sandy loam | 11.2 | 9.4 | 1.64 | 11.4 | 70.2 | 19.2 |
| 2 | █ Depth 30-60 cm | █ Sandy loam | 11.5 | 9.2 | 1.71 | 11.3 | 68.1 | 13.21 |
| 2 | █ Depth 60-90 cm | █ Sandy loam | 12.5 | 8.7 | 1.7 | 11.1 | 71.6 | 11.64 |
| 3 | █ Dpeth 90-120 cm | █ Deep sand | 10.1 | 14.1 | 1.49 | 11.4 | 59.8 | 19.38 |
| 3 | █ Depth 120-150 cm | █ Deep sand | 10.3 | 15 | 1.64 | 11.5 | 63.4 | 11.62 |
| 4 | █ 100kg urea | █ Deep sand | 10.6 | 7.6 | 1.51 | 11.6 | 68.8 | |
| 4 | █ 200kg urea | █ Deep sand | 10.9 | 8.6 | 1.48 | 11.3 | 73.4 | |
| 5 | █ | █ | ||||||
| 5 | █ | █ | ||||||
| 6 | █ | █ | ||||||
| 6 | █ | █ | ||||||
| 7 | █ | █ | ||||||
| 8 | █ | █ |
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.
