Agrónomo, doctor y docente de la Universidad de Buenos Aires | Productor en Gualeguaychú | Actualmente en Iowa State University
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ALT A photo of a field test this fall shows soybeans planted at two different times in the spring, one fully mature but still green and yellow and the other already browning. An adjacent corn field is to the right and a clear blue sky in the background.
ALT Under Business-as-usual management mean emissions from maize and soybean were 3.9 versus 2.0 kgN/ha/yr respectively. 34% of the N2O emissions from the two-crop rotation occurred in the soybean phase.
ALT At zero N input to maize, soybeans accounted for 48% of emissions. As N inputs to maize increased, the proportion of N2O emissions from soybean decreased up to a model breakpoint of 153 kgN/ha where 38.6% of the emissions were attributable to soybean.
ALT Early planting reduced N2O emissions from soybean by 0.56 kgN ha yr (17%) compared to BAU. The cover crop reduced N2O by 0.66 kgN ha yr (20%). When both strategies were combined, the reduction was 0.93 kgN/ha/yr (28%).
ALT Equipment in a field of service crops, with a tree line on the horizon
ALT Esto es solo un esquema de los distintos métodos de estimación de las emisiones anuales de N2O para visualizar la cobertura temporal de cada uno
