View Full Table | Close Full ViewTable 1.

Calculator output for Scenario 1, corn–soy–wheat rotation with conventional tillage.

 
Inputs
Outputs
CO2–equivalents
Year Crop Yield Tillage N fertilizer Soil N2O Fuel Fertilizer Total
Mg ha−1 kg ha−1 Mg ha−1 yr−1
1 corn 9.42 conventional 101 0.08 0.99 0.13 0.05 1.24
2 soy 4.03 conventional 0 0.37 0.38 0.13 0 0.88
3 wheat 3 conventional 56 0.5 0.55 0.13 0.03 1.19
Annual average 0.31 0.64 0.13 0.02 1.11



View Full Table | Close Full ViewTable 2.

Calculator output for Scenario 2, corn–soy–wheat rotation fertilized with no-till management.

 
Inputs
Outputs
CO2–equivalents
Year Crop Yield Tillage N fertilizer Soil N2O Fuel Fertilizer Total
Mg ha−1 kg ha−1 Mg ha−1 yr−1
1 corn 9.42 no-till 101 –0.77 0.99 0.07 0.05 0.34
2 soy 4.03 no-till 0 –0.22 0.38 0.07 0 0.23
3 wheat 3 no-till 56 0.04 0.55 0.07 0.03 0.68
Annual average –0.32 0.64 0.07 0.02 0.42



View Full Table | Close Full ViewTable 3.

Calculator output for Scenario 3, continuous corn fertilized at 101 kg N ha−1.

 
Inputs
Outputs
CO2–equivalents
Year Crop Yield Tillage N fertilizer Soil N2O Fuel Fertilizer Total
Mg ha−1 kg ha−1 Mg ha−1 yr−1
1 corn 9.42 conventional 101 0.08 0.99 0.13 0.05 1.24
2 corn 9.42 conventional 101 0.09 0.99 0.13 0.05 1.26
3 corn 9.42 conventional 101 0.09 0.99 0.13 0.05 1.25
Annual average 0.09 0.99 0.13 0.05 1.25



View Full Table | Close Full ViewTable 4.

Calculator output for Scenario 4, continuous corn fertilized at 134 kg N ha−1.

 
Inputs
Outputs
CO2–equivalents
Year Crop Yield Tillage N fertilizer Soil N2O Fuel Fertilizer Total
Mg ha−1 kg ha−1 Mg ha−1 yr−1
1 corn 9.42 conventional 134 0.08 1.15 0.13 0.06 1.41
2 corn 9.42 conventional 134 0.09 1.15 0.13 0.06 1.43
3 corn 9.42 conventional 134 0.09 1.15 0.13 0.06 1.42
Annual average 0.09 1.15 0.13 0.06 1.42