| Researcher(s) |
Catherine Borger (DAFWA) Abul Hashem (DAFWA) |
|---|---|
| Year(s) | 2013 |
| Contributor | Liebe Group |
| Trial location(s) |
Wongan Hills, WA
|
A four-year study has investigated if lime applied in a low pH soil could enhance the efficacy of herbicides on weeds (ryegrass and barley grass) and improve crop performance in a wheat-wheat-lupin-barley rotation at the Wongan Hills Research Station, Western Australia.
Three years after application of lime, soil pH (CaCl2) increased by 0.68–1.45 units at 0–10 cm depth, 0.20–0.47 units at 10–20 cm and 0.08–0.18 at 20–30 cm depth. • Lime reduced density of ryegrass by 42% and barley grass density by 67%, improved barley crop vigour by up to 13%, and increased barley grain yield by up to 7% in 2013. • Boxer Gold in 2013 season together with Sakura and simazine in previous seasons reduced annual ryegrass density by 96% and barley grass density by 99%, improved barley crop vigour by up to 15%, and increased barley grain yield by up to 16%. • Lime effect on efficacy of herbicides in controlling weeds was not evident.
| Lead research organisation | N/A |
|---|---|
| Host research organisation | N/A |
| Trial funding source | GRDC UWA00146 |
| Related program | N/A |
| Acknowledgments |
We gratefully thank GRDC for funding this project (UWA 00146). We acknowledge AHRI, UWA for collaboration on this project. Thanks are due to Barb Sage, Chris Roberts, and all Research Support Unit staff of Department of Agriculture and Food, Western Australia at Wongan Hills Research Station. |
| Other trial partners | Not specified |
| Crop type | Cereal (Grain): Barley |
|---|---|
| Treatment type(s) |
|
| Trial type | Experimental |
| Trial design | Replicated |
| Sow date | 14 May 2013 |
|---|---|
| Harvest date | Not specified |
| Plot size | 20m x 2m |
| Plot replication | 4 |
| Fertiliser |
80 kg/ha MacroPro Plus |
| Herbicide |
2 L/ha Spray.seed plus Boxer Gold as per treatment schedule |
| # |
Treatment 1
|
Ryegrass density (plants/m2) | Grain yield (t/ha) | Crop vigour (%) | Barley grass density (plants/m2) |
|---|---|---|---|---|---|
| 1 | █ 0 L/ha Boxer Gold | 86 | 3.13 | 100 | 96 |
| 2 | █ 0 t/ha Lime | 28 | 3.36 | 100 | 37 |
| 3 | █ 1 L/ha Boxer Gold | 9 | 3.43 | 112 | 3 |
| 4 | █ 1.25 t/ha Lime | 26 | 3.36 | 109 | 16 |
| 5 | █ 1.5 L/ha Boxer Gold | 7 | 3.62 | 112 | 1 |
| 6 | █ 2 L/ha Boxer Gold | 5 | 3.56 | 113 | 1 |
| 7 | █ 2.5 L/ha Boxer Gold | 3 | 3.6 | 116 | |
| 8 | █ 2.5 t/ha Lime | 19 | 3.59 | 113 | 17 |
| 9 | █ 5 t/ha Lime | 16 | 3.56 | 112 | 12 |
| Rainfall trial gsr (mm) | 256mm |
|---|
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.
