Which do you think affects GHG emission more? A rich grassland with multiple feet of biologically active, carbon rich soil, or a desert? Proper herd grazing is

Which do you think affects GHG emission more? A rich grassland with multiple feet of biologically active, carbon rich soil, or a desert? Proper herd grazing is a part of healthy grasslands as the animals trample plants and poop everywhere before moving to a new area to graze, creating plenty of soil.