Researcher(s) |
Nicole Dimos (SPAA) Michael Moodie (MSF) |
---|---|
Year(s) | 2011 |
Contributor | Society of Precision Agriculture Australia |
Trial location(s) |
Mildura, VIC
|
To use PA maps to indentify and sample soil zones within a paddock. To identify potential soil specific nitrogen responses within paddocks
Averaged across all sampling locations, protein levels increased by 0.6% in the 50kg/ha of urea treatment and by 1% in the 100kg/ha of urea treatment relative to the nil in-crop fertiliser strip. This increase in protein was enough to improve grain quality from Australian Standard White (ASW) to Australian Premium White (APW) at four of the six sampling locations. On the day of harvest at the nearest grain receiver site (Yelta), the ASW silo cash price was $127/t and APW was $158/t. At a urea cost of $620/t, the application of 50 kg/ha of urea costs $31/ha (fertiliser cost only). Therefore, at the four sites where grain quality was improved, a small profit was made (15 – 55 $/ha) with the application of 50 kg/ha of fertiliser. However, at one third of the protein sampling sites, a loss of $31/ha was incurred as there was no difference in grain quality between the treatments.
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 | Colin and Chris Hunt (site hosts) |
Crop type | Cereal (Grain): Wheat |
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Treatment type(s) |
|
Trial type | Precision agriculture |
Trial design | Not applicable |
Sow rate or Target density | 30 kg/ha |
---|---|
Sow date | 2 May 2011 2 May 2011 |
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Fertiliser |
MAP 30-50 kg/ha VR. Nitrogen rich strips were applied to the focus paddock on 27 July 2011 |
# | Variety |
Treatment 1
|
Treatment 2
|
Grain yield (t/ha) | Protein (%) |
---|---|---|---|---|---|
1 | █ Axe | █ Sample Location 1 | █ | 1.8 | |
2 | █ Axe | █ Sample Location 2 | █ | 1.7 | |
3 | █ Axe | █ Sample Location 3 | █ | 2.8 | |
4 | █ Axe | █ Sample Location 4 | █ | 1.3 | |
5 | █ Axe | █ Sample Location 5 | █ | 2.2 | |
6 | █ Axe | █ Sample Location 6 | █ | 1.5 | |
7 | █ Axe | █ Sample Location 1 | █ No fertiliser added | 10.3 | |
8 | █ Axe | █ Sample Location 2 | █ No fertiliser added | 10.2 | |
9 | █ Axe | █ Sample Location 3 | █ No fertiliser added | 9.9 | |
10 | █ Axe | █ Sample Location 4 | █ No fertiliser added | 9.1 | |
11 | █ Axe | █ Sample Location 5 | █ No fertiliser added | 10.9 | |
12 | █ Axe | █ Sample Location 6 | █ No fertiliser added | 9.4 | |
13 | █ Axe | █ Sample Location 1 | █ Urea @ 50 kg/ha | 10.7 | |
14 | █ Axe | █ Sample Location 2 | █ Urea @ 50 kg/ha | 10.8 | |
15 | █ Axe | █ Sample Location 3 | █ Urea @ 50 kg/ha | 10.5 | |
16 | █ Axe | █ Sample Location 4 | █ Urea @ 50 kg/ha | 10.1 | |
17 | █ Axe | █ Sample Location 5 | █ Urea @ 50 kg/ha | 11 | |
18 | █ Axe | █ Sample Location 6 | █ Urea @ 50 kg/ha | 10.5 | |
19 | █ Axe | █ Sample Location 1 | █ Urea @ 100 kg/ha | 11.2 | |
20 | █ Axe | █ Sample Location 2 | █ Urea @ 100 kg/ha | 11 | |
21 | █ Axe | █ Sample Location 3 | █ Urea @ 100 kg/ha | 11 | |
22 | █ Axe | █ Sample Location 4 | █ Urea @ 100 kg/ha | 10.4 | |
23 | █ Axe | █ Sample Location 5 | █ Urea @ 100 kg/ha | 11.5 | |
24 | █ Axe | █ Sample Location 6 | █ Urea @ 100 kg/ha | 10.9 |
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.