Nitrogen and phosphorous responses in canola compared to wheat
Location
Coroow
Aim
To compare nitrogen (N) and phosphorous (P) responses in canola and wheat.
Soil Analysis results
|
|
Depth
|
OC
|
Nit N
|
Amm N
|
P
|
PBI
|
S
|
pH
|
|
Tamma gravel loam
|
0-10cm
|
0.7
|
3
|
3
|
29
|
30
|
8
|
6.2
|
Plant Analysis results
Phosphorus uptake excellent in both crops. Nitrogen limiting in wheat. All other nutrients adequate.
Harvest results
|
Treatment
|
Wheat
|
Canola
|
|
|
Banded
|
4 DAS
|
Z14/Rosette
|
Z32/Bolting
|
|
|
Yield
|
Protein
|
Yield
|
Oil
|
|
|
(kg/ha)
|
(L/ha)
|
(L/ha)
|
(L/ha)
|
N
|
P
|
(t/ha)
|
(%)
|
(t/ha)
|
(%)
|
|
1
|
-
|
-
|
-
|
-
|
0
|
0
|
3.15
|
9.1
|
2.32
|
47.3
|
|
2
|
60 Big Phos
|
-
|
-
|
-
|
0
|
8
|
3.89
|
9.7
|
2.29
|
46.8
|
|
3
|
60 Big Phos
|
50 Flexi-N
|
50 Flexi-N
|
-
|
42
|
8
|
4.70
|
10.1
|
2.61
|
45.1
|
|
4
|
60 Big Phos
|
50 Flexi-N
|
50 Flexi-N
|
100 Flexi-N
|
84
|
8
|
4.92
|
10.5
|
2.48
|
43.9
|
|
5
|
120 Big Phos
|
-
|
-
|
-
|
0
|
16
|
4.07
|
9.8
|
2.43
|
46.8
|
|
6
|
120 Big Phos
|
50 Flexi-N
|
50 Flexi-N
|
-
|
42
|
16
|
4.91
|
10.0
|
2.42
|
45.6
|
|
7
|
120 Big Phos
|
50 Flexi-N
|
50 Flexi-N
|
100 Flexi-N
|
84
|
16
|
4.96
|
10.3
|
2.49
|
44.2
|
|
8
|
-
|
50 Flexi-N
|
50 Flexi-N
|
100 Flexi-N
|
84
|
0
|
4.80
|
10.1
|
2.44
|
44.5
|
|
|
|
|
|
|
|
|
Prob
|
<0.001
|
0.294
|
0.04
|
<0.001
|
|
|
|
|
|
|
|
LSD
|
0.46
|
nsd
|
0.18
|
1.2
|
Key results
- Excellent growing conditions produced wheat yields of up to 5.0t/ha and canola yields of up to 2.6t/ha
- Nitrogen increased wheat yields by 0.8 to 0.9t/ha, but canola was relatively unresponsive
- Neither crop was responsive to phosphorus where nitrogen was applied.
Related Products
For further information on this trial
contact your local area manager