 The bottom graphic displays the estimated yield necessary to achieve CO2 negativity for different levels of existing soil carbon saturation.The perennial rather than annual nature of miscanthus crops implies that the significant below-ground carbon accumulation each year is allowed to continue undisturbed.No annual plowing or digging means no increased carbon oxidation and no stimulation of the microbe populations in the soil, and therefore no accelerated carbon-to-CO2 conversion happening in the soil every spring.