Researcher(s) | N/A |
---|---|
Year(s) | 2014 |
Contributor | Northern Agri Group |
Trial location(s) |
Binnu, WA
|
To investigate responses to potassium and nitrogen in wheat. Wheat yeild and grain quality can be limited if either of these macro nutrients is in short supply.
Potassium levels are low in this soil and this site should have been responsive to applied potassium, however due to seasonal and soil conditions there where no differences between treatments in this trial. The very dry June-August had a marked impact on crop growth, particularly tillering. This can be seen by the lack of differences in the head counts taken in September. Very hot conditions in early August also affected flowering in wheat and limited any response in grain yeild with later rains. Soil penetrometer readings in the paddock near the trial site showed hard pan and this in conjunction with the pH and Aluminium levels below 10cm would have restricted root growth and limited the wheat plants ability to access soil miosture at depth during the dry winter period. Without yield responses to applied treatments, crop return decreased as fertiliser rates increased.
Lead research organisation | N/A |
---|---|
Host research organisation | N/A |
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 | Randomised,Replicated,Blocked |
Sow rate or Target density | 75kg/ha |
---|---|
Sow date | 8 May 2014 |
Harvest date | Not specified |
Plot size | 20m x 2.05m |
Plot replication | 3 |
Psuedoreplication | Not specified |
Fertiliser |
At seeding 75kg/ha mapszc banded |
Herbicide |
8th May 2L/ha Triflurin 26th May 800ml/ha Velocity and Hasten @ 1%vv |
Insecticide |
200ml.ha dominex & 200ml/ha Lorsban |
Other trial notes |
Soil tests at the beginning of the trial show that potassium levels are low in this soil and this site should be responsive to applied potassium. pH was reasonable in the 0-10cm, however the pH and aluminum levels below 10cm could limit root growth at this site. Total rainfall in Binnu in 2014 was 281mm compared to an average of 341mm. The growing season rainfall was 262mm which was below the average 289mm, June, July and August rainfall was well below average. Very hot conditions were experienced in early August. Unfortunately grain samples were not retained at harvest so grain quality cannot be reported on or used in the calculation of wheat returns. Grain protein and screenings may have increased at higher nitrogen rates. Returns have been calculated using APW1 as the delivery grade. |
# | Variety |
Treatment 1
|
Treatment 2
|
Return on investment ($/ha) | Grain yield (t/ha) | Head abundance (heads/m2) | Fertiliser cost ($/ha) |
---|---|---|---|---|---|---|---|
1 | █ Mace | █ 0N | █ 0K | 408.41 | 1.48 | 119 | 66.68 |
2 | █ Mace | █ 0N | █ 10K | 424.54 | 1.57 | 115 | 79.44 |
3 | █ Mace | █ 0N | █ 20K | 427.83 | 1.62 | 117 | 92.2 |
4 | █ Mace | █ 0N | █ 40K | 395.89 | 1.6 | 113 | 117.72 |
5 | █ Mace | █ 30N | █ 0K | 440.34 | 1.69 | 110 | 102.15 |
6 | █ Mace | █ 30N | █ 10K | 414.74 | 1.65 | 122 | 114.91 |
7 | █ Mace | █ 30N | █ 20K | 350.62 | 1.49 | 119 | 127.67 |
8 | █ Mace | █ 30N | █ 40K | 331.52 | 1.51 | 114 | 153.19 |
9 | █ Mace | █ 60N | █ 0K | 369.5 | 1.62 | 122 | 150.53 |
10 | █ Mace | █ 60N | █ 10K | 353.53 | 1.61 | 112 | 163.29 |
11 | █ Mace | █ 60N | █ 20K | 337.56 | 1.6 | 114 | 176.05 |
12 | █ Mace | █ 60N | █ 40K | 276.73 | 1.49 | 121 | 201.57 |
13 | █ Mace | █ 90N | █ 0K | 314.09 | 1.58 | 117 | 193.1 |
14 | █ Mace | █ 90N | █ 10K | 294.91 | 1.56 | 117 | 205.86 |
15 | █ Mace | █ 90N | █ 20K | 311.04 | 1.65 | 109 | 218.62 |
16 | █ Mace | █ 90N | █ 40K | 259.84 | 1.57 | 122 | 244.14 |
Rainfall trial gsr (mm) | 262mm |
---|
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.