Nitrogen and phosphorus responses in canola
Location
Wellstead
Aim
To determine nitrogen (N) and phosphorus (P) requirements in canola.
Soil Analysis results
|
Soil Type
|
Depth
(cm)
|
OC
(%)
|
ECEC
(meq/100g)
|
Nit N
(mg/kg)
|
Amm N
(mg/kg)
|
P
(mg/kg)
|
Fe
|
K
(mg/kg)
|
S
(mg/kg)
|
pH
(caCl2)
|
|
Mallee sand
|
0-10
|
1.4
|
3.6
|
9
|
3
|
35
|
980
|
87
|
9
|
5.1
|
|
|
10-20cm
|
0.9
|
8.0
|
6
|
1
|
12
|
1700
|
93
|
8
|
5.2
|
Harvest results
|
Treatment*
|
Yield
|
Oil
|
|
Trt
|
N
|
P
|
(t/ha)
|
(%)
|
|
1
|
0
|
0
|
0.90
|
46.0
|
|
2
|
0
|
24
|
0.82
|
46.7
|
|
3
|
40
|
24
|
1.17
|
46.8
|
|
4
|
120
|
24
|
1.62
|
43.6
|
|
5
|
120
|
0
|
1.51
|
43.6
|
|
6
|
120
|
8
|
1.72
|
44.2
|
|
7
|
80
|
8
|
1.45
|
45.1
|
|
|
|
Prob
|
<.001
|
<.001
|
|
|
|
LSD
|
0.157
|
0.70
|
Key results
- Canola at this site was very responsive to nitrogen, but only moderately responsive to phosphorus
- Canola yields responded up to 120 kg N/ha, but only to 8 kg P/ha.
For further information on this trial
contact your local area manager.