| Researcher(s) |
Nicole Dimos (SPAA) Aaron Long (SA Training ) |
|---|---|
| Year(s) | 2010 |
| Contributor | Society of Precision Agriculture Australia |
| Trial location(s) |
Field, SA
|
To compare the effects and to demonstrate the economic benefits that may result from the use of variable rate fertiliser applications by broad acre farmer trial.
The results indicate that the land owner may see economic benefit (as per Gross Margin) from the uptake of variable rate technology in paddocks with varying soil types such as this trial paddock.
| Lead research organisation |
Society of Precision Agriculture Australia |
|---|---|
| Host research organisation | N/A |
| Trial funding source | GRDC SPA000010 |
| Related program | N/A |
| Acknowledgments |
SA Training and Consulting; Vision Ag |
| Other trial partners | SA Training and Consulting; Vision Ag |
| Crop type | Cereal (Grain): Wheat |
|---|---|
| Treatment type(s) |
|
| Trial type | Precision agriculture |
| Trial design | Not applicable |
| Sow rate or Target density | 110kg/ha |
|---|---|
| Sowing machinery |
14.58ha, 34.57ha, 21.18ha |
| Sow date | 23 May 2010 23 May 2010 |
| Harvest date | 10 January 2011 |
| Plot size | Not specified |
| Plot replication | Not specified |
| Fertiliser |
8/7/2010 sprayed citric acid, potassium nitrate, mangosol, zincsol, wetter; 4/8/2010 spread urea 50kg; 29/8/2010 sprayed mangasol, zinc, copper, tilt, clopyralid, ester 680, 31/8/210 streamed easy N 75L; 23/9/2010 sprayed mangasol, copper, blast, wetter; aerial Meta 8kg |
| Herbicide |
18/4/2010 knockdown spray - AMS, spray aid, LV Ester 680, Striker, Roundup P/Max; 23/5/2010 IBS spray, Triflur X, Avadex, Gramoxone, wetter |
| Insecticide |
30/3/2010 baited 5kg Pestmaster |
| Other trial notes |
An additional benefit from the trial is that evidence suggests that the second zone may have been slightly distorted due to the Manganese levels being low, not the soil type or water holding capacity of the soil. |
| # |
Treatment 1
|
Treatment 2
|
Grain yield (t/ha) |
|---|---|---|---|
| 1 | █ Low yield | █ 40kg DAP | 0.481 |
| 2 | █ Low yield | █ 60kg DAP | 0.371 |
| 3 | █ Low yield | █ 80kg DAP | 0.341 |
| 4 | █ Medium yield | █ 40kg DAP | 2.371 |
| 5 | █ Medium yield | █ 60kg DAP | 2.714 |
| 6 | █ Medium yield | █ 80kg DAP | 2.693 |
| 7 | █ High yield | █ 40kg DAP | 3.269 |
| 8 | █ High yield | █ 60kg DAP | 3.102 |
| 9 | █ High yield | █ 80kg DAP | 3.416 |
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.
