Table 1 Life cycle assessment of GHG emissions from the soybean phase of the maize–soybean cropping system for the four management scenarios
From: Reducing greenhouse gas emissions from North American soybean production
System | N2O (kgN ha−1 yr−1) | NO3− (kgN ha−1 yr−1) | Grain yield (Mg ha−1) | GHG (kgCO2eq ha−1 yr−1) | Yield-scaled GHG (kgCO2eq Mg−1) |
|---|---|---|---|---|---|
BAU | 3.33 | 24.68 | 3.55 | 1904 | 536 |
Change with respect to BAU | |||||
Cover crop | −0.66 (−20%) | −8.31 (−34%) | −0.03 (− 1%) | −308 (−16%) | −83 (−15%) |
Early planting | −0.56 (−17%) | −2.42 (−10%) | +0.57 (+16%) | −252 (−13%) | −135 (−25%) |
Cover crop + early planting | −0.93 (−28%) | −8.83 (−36%) | +0.56 (+16%) | −426 (−22%) | −177 (−33%) |
