A chopper and discharge apparatus arranged to be mounted at the hood of a combine harvester for receiving the straw and/or chaff from the combine harvester and for discharging the materials from the combine harvester, the apparatus comprising: a housing having a feed opening into which straw and/or chaff can be fed from the combine harvester; a chopping assembly mounted in the housing and comprising a hub member mounted for rotation about a longitudinal axis of the hub member and a plurality of blade members mounted on the hub member for rotation therewith about said axis for chopping the fed materials and accelerating the chopped materials for discharge; the housing having a discharge opening through which the chopped materials are discharged;- a tailboard construction arranged relative to the housing so as to receive the stream of chopped materials from the discharge opening to engage onto a guide surface of the tailboard construction for spreading of the chopped materials; the tailboard construction extending from the housing and being adjustable by pivotal movement about a horizontal axis so as to raise and lower the tailboard construction; wherein the tailboard construction is divided into separate tailboard portions (112, 113) arranged side by side across the stream of chopped materials, each arranged to receive a portion of the stream of chopped materials; characterized in that each of the separate tailboard portions is adjustable by pivotal movement about said horizontal axis to raise and lower the respective tailboard portion (112, 113) independently of the other or others so as to vary the spreading effect on the portion of the stream of chopped materials engaging the tailboard portion and to provide a different spreading effect on the portion of the stream received thereon relative to the portions of the stream received on the other tailboard portions. a housing having a feed opening into which straw and/or chaff can be fed from the combine harvester; a chopping assembly mounted in the housing and comprising a hub member mounted for rotation about a longitudinal axis of the hub member and a plurality of blade members mounted on the hub member for rotation therewith about said axis for chopping the fed materials and accelerating the chopped materials for discharge; the housing having a discharge opening through which the chopped materials are discharged;- a tailboard construction arranged relative to the housing so as to receive the stream of chopped materials from the discharge opening to engage onto a guide surface of the tailboard construction for spreading of the chopped materials; the tailboard construction extending from the housing and being adjustable by pivotal movement about a horizontal axis so as to raise and lower the tailboard construction; wherein the tailboard construction is divided into separate tailboard portions (112, 113) arranged side by side across the stream of chopped materials, each arranged to receive a portion of the stream of chopped materials; characterized in that each of the separate tailboard portions is adjustable by pivotal movement about said horizontal axis to raise and lower the respective tailboard portion (112, 113) independently of the other or others so as to vary the spreading effect on the portion of the stream of chopped materials engaging the tailboard portion and to provide a different spreading effect on the portion of the stream received thereon relative to the portions of the stream received on the other tailboard portions.