John Sykes Rural Consulting
| Researcher(s) |
John Sykes (John Sykes Rural Consulting) |
|---|---|
| Year(s) | 2011 |
| Contributor | Riverine Plains |
| Trial location(s) |
Rand, NSW
|
To assess the effect of using variable nitrogen rates on crop yields. To determine if nitrogen-rich strips can be used to better determine the need for in-crop nitrogen.
Precision agriculture can be used to apply variable rates of nitrogen fertiliser; generating fertiliser savings and optimising yields throughout the paddock. Optimising applied nitrogen fertilser results in optimum yields and gross margin.
| Lead research organisation |
John Sykes Rural Consulting |
|---|---|
| Host research organisation |
Riverine Plains |
| Trial funding source | GRDC SPA00010 |
| Related program | N/A |
| Acknowledgments |
Angus MacNeil |
| Other trial partners | Not specified |
| Crop type | Cereal (Grain): Wheat |
|---|---|
| Treatment type(s) |
|
| Trial type | Demonstration |
| Trial design | Unreplicated |
| Sow date | 18 May 2011 |
|---|---|
| Harvest date | Not specified |
| Plot size | 640m x 24.6m |
| Plot replication | Not specified |
| Fertiliser |
Fertiliser as per treatments |
| Herbicide |
Glyphosate and boxer gold |
| Soil amelioration |
pH (H20) 6.2, pH (CaCl2) 5.5 |
| # | Variety |
Treatment 1
|
Grain yield (t/ha) |
|---|---|---|---|
| 1 | █ Lincoln wheat | █ 0N mid August | 2.9 |
| 2 | █ Lincoln wheat | █ 20 N mid August | 2.8 |
| 3 | █ Lincoln wheat | █ 40 N mid August | 3.1 |
| 4 | █ Lincoln wheat | █ 80 N mid August | 3 |
| 5 | █ Lincoln wheat | █ 80N mid June, 0N mid August | 2.9 |
| 6 | █ Lincoln wheat | █ 80N mid June, 20N mid August | 2.6 |
| 7 | █ Lincoln wheat | █ 80N mid June, 40N mid August | 3.2 |
| 8 | █ Lincoln wheat | █ 80N mid June, 80N mid August | 2.9 |
| Rainfall trial gsr (mm) | 226mm |
|---|
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.
