Fossil emission
|
Field operations
|
Field preparationa
|
Lime application
|
John Deere 5000–7000 (140–360 HP)
|
5.2
|
5.2
|
5.2
|
5.2
|
Subsoiler
|
John Deere 9000 (540 HP)
|
12.4
|
12.4
|
12.4
|
12.4
|
Harrow
|
John Deere 9000 (540 HP)
|
3.8
|
3.8
|
3.8
|
3.8
|
Strip tillage
|
John Deere 9000 (540 HP)
|
5.4
|
5.4
|
5.4
|
5.4
|
Planter
|
Game (250–300 HP)
|
5.7
|
5.7
|
5.7
|
5.7
|
Herbicide application
|
John Deere 5000–7000 (140–360 HP)
|
2.1
|
2.1
|
2.1
|
2.1
|
Harvestb
|
Cane harvester
|
John Deere 3522 (337 HP)
|
63.1
|
63.1
|
63.1
|
63.1
|
Loader
|
Cat 950 and John Deere 624 (175–200 HP)
|
10.8
|
10.8
|
10.8
|
10.8
|
Hauler
|
Cat 773B-E (650–675 Hp)
|
18.1
|
18.1
|
18.1
|
18.1
|
Fabrication/maintenancec
|
Farm machinery
|
Tractors, implements and trucks
|
45.7
|
45.7
|
45.7
|
45.7
|
Seed propagationd
| |
1950.0
|
1950.0
|
1300.2
|
1300.2
|
Irrigatione
| |
58.7
|
29.9
|
58.7
|
29.9
|
Field operations subtotal
|
2181.2
|
2152.3
|
1531.4
|
1502.5
|
Agricultural inputs
|
Fertilizer applicationf
|
344.68 kg ha−1 year−1 for SC, 243.63 kg ha−1 year−1 for N
|
355.0
|
355.0
|
236.8
|
236.8
|
Herbicideg
|
Applied at a rate 20.307 kg ha−1 year−1 for first year
|
114.5
|
114.5
|
114.5
|
114.5
|
Lime (CaO)h
|
Applied at a rate of 2569 kg ha−1 every 2 years
|
308.3
|
308.3
|
308.3
|
308.3
|
Agricultural inputs subtotal
|
777.8
|
777.8
|
659.6
|
659.6
|
Fossil emission subtotal
|
2959.0
|
2930.1
|
2190.9
|
2162.1
|
Non-fossil emissions
|
Litter decompositioni
| |
10.3
|
4.6
|
41.3
|
18.2
|
Pre-harvest burning emissionsj
|
Burn emissions of CH4 and N2O
| |
320.3
|
141.0
|
0.0
|
Black carbon
| |
1644.0
|
797.7
|
0.0
|
0.0
|
Soil emisisonsk
|
N2O emission
| |
44.5
|
31.7
|
62.1
|
54.0
|
CH4 emission
| |
− 29.4
|
− 19.7
|
− 40.9
|
− 35.4
|
Non-fossil emissions subtotal
|
1989.7
|
955.1
|
62.5
|
36.9
|
Total emissions
|
4948.6
|
3885.2
|
2253.5
|
2198.9
|
Outputs
|
Δ Soil carbon (surface layer)l
|
0
|
0
|
− 6828
|
− 6820
|
Δ Soil carbon (deep profile)l
|
0
|
0
|
− 14,571
|
− 17,359
|
Net flux (surface layer)
| | |
− 4574.5
|
− 4621.1
|
Net flux (deep profile)
| | |
− 12,317.5
|
− 15,160.1
|