Managing Stubble to increase
Soil Carbon
Graham Centre Field Forum 2015 – Iain Hume – Water Research – 3 Sept 2015
Incorporation
p
with Nutrients
Best Possible Conversion
Stubble
(t/ha)
MAP
(kg/ha)
Urea
(kg/ha)
Max C
(t/ha)
2013
60
6.0
80
55
0 78
0.78
2014
8.5
110
77
1.10
88
1.88
Costs – Returns
2013
2014
6.0
8.5
Fertiliser
87
120
Spreading
2
2
Incorporation
30
30
119
152
-41
-58
78
62
Stubble load (t/ha)
Costs
Total
Returns
Carbon @ 22.7 ($/t)
N tC
Net
Costt
Carbon
I+
IControl
I+
IControl
Yield – Canola 2014
2.5
Grain Yiield (t/ha)
2
1.5
1
0.5
0
Control
I-
I+
Canola Development
Would yyou do this?