| Researcher(s) |
Peter Baines (P Baines Agronomy) Jason Collier (Rand Fertilizers Ltd) Nicole Dimos (SPAA) Paul Ianson (P Baines Agronomy) John Sykes (John Sykes Rural Consulting) |
|---|---|
| Year(s) | 2011 |
| Contributor | Society of Precision Agriculture Australia |
| Trial location(s) |
Rand, NSW
|
There was a visual response to P applied at sowing and up until after Z31. This did not translate into yield at harvest. There was an inital response to varying seeding rate but this was not obvious at Z31 and did not translate into a yield response. The results may have been a reflection of the dry spring and the time of application. The addition of P therefore resulted in the loss of money. There was no visual response to applying N in the N rich strip in either zone. DSN results and yield targets assessed using weather prediction and the French and Schultz model were therefore used to determine a single rate of N for all plots in both zones of 3.5 t/ha. The harvest results showed no response in the N rich strip but as these were only 80 metres wide and had additional N at Z31, the result may not be a reliable guide to whether there was a response at the site. There was no response to N at harvest. Overall the yield was disappointing and well below the target and the quality was also below the target.
| Lead research organisation |
Society of Precision Agriculture Australia |
|---|---|
| Host research organisation | N/A |
| Trial funding source | GRDC SPA000010 |
| Related program | N/A |
| Acknowledgments |
This project was funded by the Grains Research and Development Corporation (GRDC) |
| Other trial partners | Roy and Leanne Hamilton (Property owner's) |
| Crop type | Cereal (Grain): Wheat |
|---|---|
| Treatment type(s) |
|
| Trial type | Precision agriculture |
| Trial design | Unknown,Not applicable |
| Sow date | 12 May 2011 12 May 2011 |
|---|---|
| Harvest date | Not specified |
| Plot size | Not specified |
| Plot replication | Not specified |
| Fertiliser |
P (0, 30, 50, 75 and 100 kg/ha as MAP) applied at sowing |
| Herbicide |
Glyphosate and Trifluralin applied to all plots |
| Other trial notes |
Up to 15 farmers associated with the group are intending to use PA to better assess the need for gypsum and lime application on paddocks. This will involve EM Surveying, zoning the paddocks and soil testing in zones prior to making individual zonal recommendations for lime and gypsum. Up to 12 farmers in the group have yield maps that will be processed in 2012 and about 3 of these intend to try at least 1 paddock with variable rate P or N. |
| # |
Treatment 1
|
Plant density (plants/m2) | Protein (%) | Screenings (%) | Grain yield (t/ha) | Moisture (%) | Test weight (kg/hL) | Tillers (no./m2) |
|---|---|---|---|---|---|---|---|---|
| 1 | █ Seed @ 70kg/ha, MAP @ 50kg/ha | 124 | 10.4 | 1.2 | 3.1 | 9.1 | 80 | 447 |
| 2 | █ Seed @35kg/ha, MAP @ 50kg/ha | 65 | 11.2 | 1.5 | 3.2 | 8.9 | 80 | 321 |
| 3 | █ Seed @ 50kg/ha, MAP @ 50kg/ha | 74 | 11.1 | 1.5 | 3.1 | 9 | 81 | 422 |
| 4 | █ Seed @ 70kg/ha, MAP @ 0kg/ha | 117 | 10.9 | 2.9 | 2.9 | 8.9 | 80 | 265 |
| 5 | █ Seed @ 70kg/ha, MAP @ 30kg/ha | 131 | 11.1 | 3 | 2.9 | 8.9 | 80 | 463 |
| 6 | █ Seed @ 70kg/ha, MAP @ 50kg/ha | 128 | 11.1 | 2.6 | 2.9 | 9 | 80 | 455 |
| 7 | █ Seed @ 70kg/ha, MAP @ 75kg/ha | 119 | 11.1 | 2.6 | 2.9 | 9 | 80 | 466 |
| 8 | █ Seed @ 70kg/ha, MAP @ 100kg/ha | 133 | 11.4 | 2.6 | 2.9 | 9 | 81 | 421 |
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.
