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| Researcher(s) |
David Armstrong Naveed Aslam Yunying Fang Shane Hildebrand Yan Jia Albert Oates Susan Orgill Wayne Pitt Graeme Sandral Ehsan Tavakkoli Shihab Uddin |
|---|---|
| Year(s) | 2019 |
| Contributor | Department of Primary Industries NSW |
| Trial location(s) |
Rand, NSW, NSW
|
| Further information | View external link |
This paper reports 2019 results from a subsoil amelioration experiment aimed at minimising the yield gap on sodic subsoils by treating them with various organic and inorganic amendments in pelletised form
• Deep placement of organic and inorganic amendments increased grain yield by 20–40% for three successive years on a sodic subsoil at Rand.
• Deep placement of organic and inorganic amendments increased root growth and soil water use from the deeper clay layers during the grain filling-stage.
• Improvements in grain yield with deep placement of organic and inorganic amendments were associated with reduced subsoil pH and exchangeable sodium percentage, and increased microbial activity.
Randomised complete block design (RCBD) with four replications
| Lead research organisation | N/A |
|---|---|
| Host research organisation | N/A |
| Trial funding source | GRDC DAV00149 |
| Trial funding source | DPI NSW |
| Related program | N/A |
| Acknowledgments |
This experiment was part of the project ‘Understanding the amelioration processes of the subsoil application of amendments in the Southern Region’, DAV00149, 2015–20. The project is a collaborative partnership between GRDC, Agriculture Victoria, NSW DPI, La Trobe University, University of South Australia, Southern Farming Systems, Primary Industries and Regions South Australia, South Australian Research and Development Institute and University of Tasmania. |
| Other trial partners | Not specified |
| Crop type | Cereal (Grain): Wheat |
|---|---|
| Treatment type(s) |
|
| Trial type | Experimental |
| Trial design | Randomised,Replicated,Blocked |
| Sow rate or Target density | Seed rate: 4.4 kg/ha |
|---|---|
| Sowing machinery |
Sown with an air seeder spaced at 250 mm using a GPS auto-steer system |
| Sow date | 10 April 2019 |
| Harvest date | 30 October 2019 |
| Trial design method | RCBD Randomised Complete Block Design |
| Plot size | Not specified |
| Plot replication | 4 |
| Plot randomisation | Y |
| Fertiliser |
• 90 kg/ha mono-ammonium phosphate (MAP) (at sowing) • Urea 220 kg/ha (top dressed on 28 June 2019) |
| Other trial notes |
This research paper is an extract from the publication Southern NSW Research Results 2020, available at |
SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
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16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.
