ABSTRACT
Modern, large combine harvesters discharge a higher flow of material other than grain (MOG) on a small-width swath relative to the header width. The weed and grain loss are thus concentrated behind the combine. The axial-flow harvesters process the vegetal material more intensively than the conventional combines; if the postharvest residues are left behind the combine and are shallowly incorporated into the soil, the accumulation of organic matter in the upper soil layer becomes a problem due to their insufficient decomposition and conversion to humus.
