Long term potassium strategies
Trial Location
Williams
Aim
To determine:
- the responsiveness of canola to potassium (K), and
- the efficiency gains from banded K-Till Plus compared with topdressed Muriate of Potash.
Soil Analysis results
|
Soil Type
|
Depth
(cm)
|
OC
(%)
|
ECEC
(meq/100g)
|
P
(mg/kg)
|
PBI
|
K
(mg/kg)
|
S
(mg/kg)
|
pH
(CaCl2)
|
|
Marri gravelly loam
|
0-10
|
5.0
|
8.1
|
30
|
155
|
35
|
10
|
5.0
|
|
|
20-30
|
0.9
|
4.2
|
5
|
|
28
|
5
|
5.2
|
Plant Analysis results
Potassium identified as the only limiting nutrient. K-Till Plus (12K) more effective than MoP topdressed (24K).
Harvest results
|
Treatments |
N |
K |
K uptake
(6 WAS)
(mg/plant) |
Harvest |
IBS
(Kg/ha) |
Banded
(Kg/ha) |
Yield
(t/ha) |
Oil
(%) |
| 1 |
- |
103 Agflow Extra |
18 |
0 |
5.1 |
0.60 |
37.0 |
| 2 |
- |
130 K-Till Plus |
18 |
12 |
13.5 |
0.74 |
36.5 |
| 3 |
50 MoP |
103 Agflow Extra |
18 |
25 |
8.6 |
0.91 |
37.3 |
| 4 |
100 MoP |
103 Agflow Extra |
18 |
50 |
10.2 |
0.97 |
37.9 |
|
| |
|
|
|
Prob |
0.008 |
<0.001 |
0.53 |
| |
|
|
|
LSD |
3.76 |
0.09 |
nsd |
Key results
- K-Till Plus significantly improved early potassium supply compared with topdressed Muriate of Potash
- Frost severely limited yields and probably oil concentrations
- Potassium increased canola yield from 0.6t/ha to 1.0t/ha.
Related Products
For further information on this trial
contact your local area manager.