| Researcher(s) |
Nicole Dimos (SPAA) Karen Haigh (SFS) Andrew Whitlock (Precision Agriculture) |
|---|---|
| Year(s) | 2011 |
| Contributor | Society of Precision Agriculture Australia |
| Trial location(s) |
Inverleigh, VIC
Wongan, Vic |
To use a combination of N-rich strip and satellite imagery in canola to determine a variable rate nitrogen plan.
Applying nitrogen on the sand soil zones has consistently delivered sound economic returns. The highest ROI achieved in the sand west zone ($123.20) and sand east zone ($37.85) was in the 115 and 130kg urea/ha treatments respectively. Applying nitrogen in the clay zone however failed to deliver an economic eturn and this has been realised in this paddock before. This trial highlighted that variable rate nitrogen is highly applicable to paddocks with high degrees of spatial variability in order to maximise yield and/or return on investment in individual paddock zones.
| 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) in cooperation with Glenelg Hopkins CMA |
| Other trial partners | James Knight, Warakirri (cooperating farmer) |
| Crop type | Oilseed: Canola |
|---|---|
| Treatment type(s) |
|
| Trial type | Precision agriculture |
| Trial design | Not applicable |
| Sowing machinery | Not specified |
|---|---|
| Sow date | Not specified |
| Harvest date | Not specified |
| Plot size | Not specified |
| Plot replication | Not specified |
| Fertiliser | Not specified |
| Other trial notes |
George is certainly keen to further progress ryegrass patch management by more accurately defining these ryegrass zones. |
| Sowing machinery |
135 ha |
|---|---|
| Sow date | Not specified |
| Harvest date | Not specified |
| Plot size | Not specified |
| Plot replication | Not specified |
| Fertiliser |
0, 65, 115 and 130 kg urea/ha and 122 L UAN/ha |
| Other trial notes |
George is certainly keen to further progress ryegrass patch management by more accurately defining these ryegrass zones. |
| # |
Treatment 1
|
Soil ammonium (mg/kg) | Soil nitrate (mg/kg) | Soil mineral N (kg N/ha) | Sulphur (mg/kg) |
|---|---|---|---|---|---|
| 1 | █ Paddock P18-19 - 14 @ 40 cm depth | 2.7 | 13.5 | 16.2 | 15.7 |
| 2 | █ Paddock P18-19 - 38 @ 50 cm depth | 3.7 | 19.7 | 23.4 | 16.9 |
| 3 | █ Paddock P18-19 - 45 @ 30 cm depth | 3.3 | 16.4 | 19.7 | 9.8 |
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.
