| Researcher(s) | N/A |
|---|---|
| Year(s) | 2025 |
| Contributor | Ag Grow Agronomy and Research Pty Ltd |
| Trial location(s) |
Barellan, NSW
|
The Barellan trial was set up to determine the legacy benefits of a pulse crop to the following crop in the rotation, and in particular which pulse species leaves the best legacy in terms of nitrogen benefit, disease pressure, water use efficiency as well as crop sequence gross margins. 2025 was the second year of this three year project.
• Drought conditions were experienced in the 2025 season, with dry, warm, and windy weather persisting for much of the season. The trial received less than 150mm of growing season rainfall, with 45mm of this rain falling from mid September.
• Pulse species differed in nitrogen fixation, with N fixation data from the 2023 pulse species showing field peas (136kg N) fixing the highest amount of N, followed by lupins (130kg N), while chickpeas (58kg N) and lentils (75kg N) fixed the least.
• 2025 was the second year of the project, with some differences observed in legacy effects between pulse species. Barley following vetch showed the strongest legacy response in 2025, with higher NDVI and grain yield of barley following vetch compared to the other pulse species.
• Disease and soil-borne pathogen risks were generally low across all pulse species, with minimal risk of carryover to the subsequent barley crop.
| Lead research organisation | N/A |
|---|---|
| Host research organisation | N/A |
| Trial funding source | GRDC AGG2403-001RTX |
| Related program | N/A |
| Acknowledgments |
This GRDC NGN initiative is led by Ag Grow Agronomy and Research. |
| Other trial partners | Not specified |
| Crop type | Cereal (Grain): Barley |
|---|---|
| Treatment type(s) |
|
| Trial type | Experimental |
| Trial design | Replicated |
| Sow rate or Target density | 35 kg/ha |
|---|---|
| Sow date | 28 May 2025 |
| Harvest date | 20 November 2025 |
| Plot size | Not specified |
| Plot replication | Not specified |
| Fertiliser |
Sowing fertiliser: 80 kg/ha DAP |
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.
