An agricultural harvester, comprising: a chassis; a cleaning system carried by said chassis and configured to clean crop material, the cleaning system comprising an upper sieve and a lower sieve, vertically arranged relative to each other and configured to oscillate in a fore-to-aft manner to spread the crop material across the sieves (48, 50), while permitting the passage of cleaned grain by gravity through openings of the sieves (48, 50), the cleaning system further comprising a bottom pan; a crop material elevator carried by said chassis and supplied with the cleaned grain from said cleaning system; and an auger assembly carried by said chassis and configured to supply the cleaned grain from the sieves (48, 50) and from the bottom pan to an inlet of said crop material elevator, the bottom pan being positioned beneath the sieves (48, 50) and angled so as to permit the cleaned grain to flow, under the influence of gravity, into an auger trough of the auger assembly, said auger assembly including: an auger having an auger shaft defining an axis of rotation and a flighting carried by said auger shaft, said auger being configured to rotate said flighting in a sweeping path about said axis of rotation and convey the cleaned grain toward said crop material elevator; and the auger trough, positioned along a lowermost edge of the bottom pan, near a forward end of the sieves (48, 50) and extending along a width of the sieves (48, 50), the auger trough being placed adjacent to said auger to hold the cleaned grain in said sweeping path and having a bottom, a first portion and a second portion extending along the width of the sieves (48, 50), the bottom being provided below said sweeping path, the first portion being provided on a first side of said bottom and the second portion on a second side opposite said first side of said bottom; characterized in that: said second portion of said auger trough has an end directed toward said first portion in a direction of said sweeping path. a chassis; a cleaning system carried by said chassis and configured to clean crop material, the cleaning system comprising an upper sieve and a lower sieve, vertically arranged relative to each other and configured to oscillate in a fore-to-aft manner to spread the crop material across the sieves (48, 50), while permitting the passage of cleaned grain by gravity through openings of the sieves (48, 50), the cleaning system further comprising a bottom pan; a crop material elevator carried by said chassis and supplied with the cleaned grain from said cleaning system; and an auger assembly carried by said chassis and configured to supply the cleaned grain from the sieves (48, 50) and from the bottom pan to an inlet of said crop material elevator, the bottom pan being positioned beneath the sieves (48, 50) and angled so as to permit the cleaned grain to flow, under the influence of gravity, into an auger trough of the auger assembly, said auger assembly including: an auger having an auger shaft defining an axis of rotation and a flighting carried by said auger shaft, said auger being configured to rotate said flighting in a sweeping path about said axis of rotation and convey the cleaned grain toward said crop material elevator; and the auger trough, positioned along a lowermost edge of the bottom pan, near a forward end of the sieves (48, 50) and extending along a width of the sieves (48, 50), the auger trough being placed adjacent to said auger to hold the cleaned grain in said sweeping path and having a bottom, a first portion and a second portion extending along the width of the sieves (48, 50), the bottom being provided below said sweeping path, the first portion being provided on a first side of said bottom and the second portion on a second side opposite said first side of said bottom; an auger having an auger shaft defining an axis of rotation and a flighting carried by said auger shaft, said auger being configured to rotate said flighting in a sweeping path about said axis of rotation and convey the cleaned grain toward said crop material elevator; and the auger trough, positioned along a lowermost edge of the bottom pan, near a forward end of the sieves (48, 50) and extending along a width of the sieves (48, 50), the auger trough being placed adjacent to said auger to hold the cleaned grain in said sweeping path and having a bottom, a first portion and a second portion extending along the width of the sieves (48, 50), the bottom being provided below said sweeping path, the first portion being provided on a first side of said bottom and the second portion on a second side opposite said first side of said bottom; characterized in that: said second portion of said auger trough has an end directed toward said first portion in a direction of said sweeping path.