| Researcher(s) |
Rachael Whitworth |
|---|---|
| Year(s) | 2024 |
| Contributor | Ag Grow Agronomy and Research Pty Ltd |
| Trial location(s) |
Griffith, NSW
|
The aims of this trial project were to measure:
1. The efficacy of applied lime on grain yield and profitability
2. Differences between incorporation methods
3. Differences between incorporation depths
4. Impact on phosphorous uptake efficiency
Cultivation x lime:
• The crop performed better when cultivation to 20 cm occurred by chisel +offset. This outperformed rotary hoe and cultivation to 10cm.
• The addition of lime increased yield (0.24 t/ha) compared to un-limed plots, although the increase in yield caused a decrease in grain protein.
• There was no interaction between lime and cultivation evident. except for grain test weight.
• If only cultivating to 10 cm, liming (3 t/ha) produced optimal yield, but grain protein was reduced.
Micronutrients and P:
• The soil was responsive to P fertiliser but not micronutrients.
• The addition of P increased plant vigour, NDVI, grain test weight, and grain yield.
• An interaction of lime and micronutrients was evident for vigour, with better crop vigour in plus P, plus lime compared to all other treatments.
• Where lime was applied there were lower screenings in treatments without P, compared to treatments with no P and no lime.
Economics:
• After 3 years there has been no economic advantage of lime. Liming is producing greater revenue; however profit has been substantially lower than nil lime.
• A pulse crop is to be grown in the rotation in 2025 and should further tease out treatment differences.
| Lead research organisation | N/A |
|---|---|
| Host research organisation | N/A |
| Trial funding source | GRDC AGG2206-001RTX |
| Related program | N/A |
| Acknowledgments | N/A |
| Other trial partners | Not specified |
| Crop type | Cereal (Grain): Wheat |
|---|---|
| Treatment type(s) |
|
| Trial type | Experimental |
| Trial design | Replicated |
| Sow rate or Target density | 35 kg/ha |
|---|---|
| Sowing machinery |
Tractor pulled Morris with 25cm row spacing x 7 rows |
| Sow date | 24 April 2024 |
| Harvest date | 19 November 2024 |
| Trial design method | RCBD Randomised Complete Block Design |
| Plot size | 36m x 1.75m |
| Plot replication | 4 |
| Plot randomisation | N |
| Fertiliser |
80 kg/ha DAP applied to appropriate plots. 100 kg/ha of urea was spread early April, and it was top dressed with 150 kg/ha of Urea in July. |
| Other trial notes |
This trial is part of a 3 year trial project. Refer to https://www.farmtrials.com.au/trial/40903 for details of 2022 and 2023 trials. |
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.