Introduction.

Fossil combustion and fertilizer decomposition are the main sources of greenhouse gas emissions in sugarcane crops.

Objective.

Perform a comparative analysis of Carbon Footprint scenarios in commercial and organic sugarcane crops.

Materials and Methods.

Carbon Footprint was calculated based on IPCC Guidelines; emission projections were obtained through system dynamics and the opportunities for emissions reductions were obtained with sensitivity analysis.

Results.

The first CO2 emission model for fossil combustion obtained a level of 1.87 tCO2-eq/ha in a commercial crop and 1.67 tCO2-eq/ha in an organic crop, projected for 25 years. The second N2O emissions model for fertilizer decomposition achieved a level of 6.l8 tCO2-eq/ ha in a commercial crop and 4.62 tCO2-eq/ha in an organic crop, simulated for 5 years.

Conclusion.

The adoption of specific agricultural practices in each agro-ecological zone represents an opportunity to reduce CO2 emissions, which corresponds to 3l% for commercial crop and 0.49% for organic crop. A proper fertilizer application according to soil characteristics and the crop's harvest cycle contributes to reducing I2O emissions by up to 40% for commercial crop and 25% for organic crop.