| Researcher(s) |
Bill Bowden (WMG) Chris Wilkins (WMG) |
|---|---|
| Year(s) | 2015 |
| Contributor | West Midlands Group |
| Trial location(s) |
Dandaragan, WA
|
To motivate growers to carry out direct problem diagnostics in their crops using:
To develop a protocol for setting up strip tests and interpretation procedures for growers with different levels of commitment and time and to answer the 'why is it so?' quesitons.
Deep cultivation strips on growers’ properties did not show much in the way of early responses and so did not excite much grower interest as a direct diagnostic of the hardpan conditions in their paddocks. However, at responsive sites, there was a lot of grower interest to the level where it might be worth funding another year of this direct diagnostic approach in the hope that early season conditions are conducive to major nitrogen growth responses.
| Lead research organisation | N/A |
|---|---|
| Host research organisation | N/A |
| Trial funding source | GRDC |
| Related program |
Regional Cropping Solutions Network |
| Acknowledgments |
Thanks to GRDC for funding the project, Charles Roberts for use of the land and to Caz Abbey for technical assistance and dangerous videotaping. |
| Other trial partners | Paper reviewed by Steve Davies |
| Crop type | Cereal (Grain): Wheat |
|---|---|
| Treatment type(s) |
|
| Trial type | Experimental |
| Trial design | Blocked |
| Sow rate or Target density | 100kg/ha Mace wheat |
|---|---|
| Sowing machinery |
Ripped with the DAFWA Merredin ripper to 35 cm with modified box boots. The trial was sown by the farmer as a bulk wheat crop across the ripped treatments. |
| Sow date | 25 May 2015 |
| Harvest date | Not specified |
| Plot size | 10m x 3m |
| Plot replication | 4 |
| Fertiliser |
80 kg/ha of MAXamRITE and 50 litres/ha of MAXamFLO applied at seeding. 100kg NKS applied in late June. Treatments: The 4/5 WAS N treatments were applied at 110 kg urea/ha on 1 July and the 8/9 WAS N treatments were applied at 110 kg urea/ha on 29 July. |
| Herbicide |
Pre-seeding: 0.4L 2,4-D ester 680 + 1.8L Roundup 570 (80L water rate). Seeding (25 May): 2L trifluralin 480 + 1L Sprayseed + 300mL chlorpyrifos (80L water rate). Post-seeding: 0.8L 2,4-D ester 680 + 10g Logran + 50g Lontrel + 300mL Tebuconazole + Alpha Cyper 125mL Wetter 1000 0.2% (100L water rate).
|
| @T1: (10-07-2015) | @T2: (29-07-2015) | @T3: (11-08-2015) | @T4: (08-09-2015) | @T5: (09-11-2015) | |||||
|---|---|---|---|---|---|---|---|---|---|
| # |
Treatment 1
|
Harvest index (value) | Screenings (%) | 1000 grain weight (g) | Plant density (plants/m2) | Biomass (t/ha) | Biomass (t/ha) | Biomass (t/ha) | Biomass (t/ha) |
| 1 | █ Ripped | 0.41 | 17 | 31 | 150 | 0.7 | 1.2 | 3.3 | 4.9 |
| 1 | █ Not ripped | 0.39 | 23 | 31 | 85 | 0.4 | 0.8 | 2.4 | 3.3 |
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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.
