A tedding apparatus for tedding cut agricultural biomass lying in an agricultural field, said cut biomass comprises a crop of grass and clover originating from its growth site at a portion of said agricultural field; wherein said apparatus comprises: - a frame; - one or more mechanical tedding devices for providing mechanical tedding to said cut biomass; said one or more mechanical tedding devices is/are arranged on said frame; - a control unit for controlling the operation of said one or more mechanical tedding devices and/or for controlling the operation of said apparatus; wherein said control unit is configured to receive said estimation information from said data storage; wherein in respect of one or more of said mechanical tedding devices, said mechanical tedding device comprises adjustment means for adjusting the severity of the mechanical tedding subjected to said biomass originating from said portion of said agricultural field, in response to a severity adjustment signal being provided thereto; wherein said control unit is configured to provide said severity adjustment signal to said mechanical tedding device in response to said estimation information, thereby effecting an adjustment of the severity of the mechanical tedding being subjected to said biomass, depending on the magnitude of a specific crop coverage being present in said portion of said agricultural field; characterized by a data storage for storing estimation information relating to an estimated magnitude of a specific crop coverage being present in said portion of said agricultural field and in that said estimation information relating to an estimated magnitude of a specific crop coverage is independently selected from the group comprising: - coverage of grass; and/or - coverage of clover; and/or - coverage of weed; and/or - a ratio relating to: coverage of grass / coverage of clover; and/or - a ratio relating to: coverage of grass / coverage of clover / coverage of weed. - a frame; - one or more mechanical tedding devices for providing mechanical tedding to said cut biomass; said one or more mechanical tedding devices is/are arranged on said frame; - a control unit for controlling the operation of said one or more mechanical tedding devices and/or for controlling the operation of said apparatus; wherein said control unit is configured to receive said estimation information from said data storage; wherein in respect of one or more of said mechanical tedding devices, said mechanical tedding device comprises adjustment means for adjusting the severity of the mechanical tedding subjected to said biomass originating from said portion of said agricultural field, in response to a severity adjustment signal being provided thereto; wherein said control unit is configured to provide said severity adjustment signal to said mechanical tedding device in response to said estimation information, thereby effecting an adjustment of the severity of the mechanical tedding being subjected to said biomass, depending on the magnitude of a specific crop coverage being present in said portion of said agricultural field; characterized by a data storage for storing estimation information relating to an estimated magnitude of a specific crop coverage being present in said portion of said agricultural field and in that said estimation information relating to an estimated magnitude of a specific crop coverage is independently selected from the group comprising: wherein said control unit is configured to receive said estimation information from said data storage; wherein in respect of one or more of said mechanical tedding devices, said mechanical tedding device comprises adjustment means for adjusting the severity of the mechanical tedding subjected to said biomass originating from said portion of said agricultural field, in response to a severity adjustment signal being provided thereto; wherein said control unit is configured to provide said severity adjustment signal to said mechanical tedding device in response to said estimation information, thereby effecting an adjustment of the severity of the mechanical tedding being subjected to said biomass, depending on the magnitude of a specific crop coverage being present in said portion of said agricultural field; characterized by a data storage for storing estimation information relating to an estimated magnitude of a specific crop coverage being present in said portion of said agricultural field and in that said estimation information relating to an estimated magnitude of a specific crop coverage is independently selected from the group comprising: - coverage of grass; and/or - coverage of clover; and/or - coverage of weed; and/or - a ratio relating to: coverage of grass / coverage of clover; and/or - a ratio relating to: coverage of grass / coverage of clover / coverage of weed.