| Researcher(s) |
Mark Steele (La Trobe University) Rohan Wardle (SFS) |
|---|---|
| Year(s) | 2007 |
| Contributor | Southern Farming Systems |
| Trial location(s) |
Inverleigh, VIC
|
1. Assess the potential yield loss/gains when increasing the seed row width for the benefits of subsequent interâ€row (noâ€till) cropping;
2. To determine if nitrogen application efficiency can be increased in wider row spacing by applying the nitrogen either as an up front or in crop treatment;
3. To assess the varietal yield response to row spacing width, in response to nitrogen timing and row widths;
4. To assess weed incidence and disease pressure across each seed row width to determine crop competition factors.
In 2007, wider row spacings (400mm vs 200mm) significantly (P<0.01) reduced yield (4.36t/ha vs 4.69t/ha) when averaged across five barley varieties and two nitrogen timings, suggesting that the benefits of wider row sowing for crop residue management practices are coming at a significant financial cost ($100/ha+, using current prices). However, the barley variety WI with nitrogen applied at
sowing (GS00) achieved the opposite result, as wider row spacings (400mm vs 200mm) significantly (P<0.05) increased yield (5.15t /ha vs 4.31t/ha).
| Lead research organisation | N/A |
|---|---|
| Host research organisation | N/A |
| Trial funding source | GRDC DAN00104 |
| Related program | N/A |
| Acknowledgments |
Special thanks to the Hamilton family for allowing us the use of the Inverleigh research site and thanks to “Barley agronomy for southern Australia” for their support of this trial. |
| Other trial partners | Not specified |
| Crop type | Cereal (Grain): Barley |
|---|---|
| Treatment type(s) |
|
| Trial type | Experimental |
| Trial design | Randomised,Replicated,Blocked |
| Sow rate or Target density | 80kg/ha |
|---|---|
| Sow date | 27 June 2007 |
| Harvest date | 21 January 2008 |
| Plot size | Not specified |
| Plot replication | Not specified |
| # | Variety |
Treatment 1
|
Grain yield (t/ha) |
|---|---|---|---|
| 1 | █ Gairdner | █ None | 4.21 |
| 2 | █ Capstan | █ None | 5.09 |
| 3 | █ VBO432 | █ None | 4.3 |
| 4 | █ Wabar | █ None | 4.17 |
| 5 | █ WI | █ None | 4.83 |
| 6 | █ Gairdner | █ GS00 N | 4.15 |
| 7 | █ Capstan | █ GS00 N | 5.32 |
| 8 | █ VBO432 | █ GS00 N | 4.15 |
| 9 | █ Wabar | █ GS00 N | 4.1 |
| 10 | █ WI | █ GS00 N | 4.77 |
| 11 | █ Gairdner | █ GS 31 N | 4.28 |
| 12 | █ Capstan | █ GS 31 N | 4.87 |
| 13 | █ VBO432 | █ GS 31 N | 4.45 |
| 14 | █ Wabar | █ GS 31 N | 4.23 |
| 15 | █ WI | █ GS 31 N | 4.89 |
| 16 | █ Gairdner | █ 400mm row | 3.98 |
| 17 | █ Capstan | █ 400mm row | 4.82 |
| 18 | █ VBO432 | █ 400mm row | 4.23 |
| 19 | █ Wabar | █ 400mm row | 3.8 |
| 20 | █ WI | █ 400mm row | 4.98 |
| 21 | █ Gairdner | █ 300mm row | 4.25 |
| 22 | █ Capstan | █ 300mm row | 5.14 |
| 23 | █ VBO432 | █ 300mm row | 4.36 |
| 24 | █ Wabar | █ 300mm row | 3.99 |
| 25 | █ WI | █ 300mm row | 4.81 |
| 26 | █ Gairdner | █ 200mm row | 4.42 |
| 27 | █ Capstan | █ 200mm row | 5.33 |
| 28 | █ VBO432 | █ 200mm row | 4.32 |
| 29 | █ Wabar | █ 200mm row | 4.72 |
| 30 | █ WI | █ 200mm row | 4.7 |
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.
