A harvester assembly is described that comprises a feeder assembly (220), a bottom floor assembly (230), and a crop collection channel positioned therebetween. The front and the rear portion of the bottom floor assembly are capable of independent, variable movement in order to facilitate the passage of crop material through the crop collection channel with a reduced risk of clogging or plugging of the channel. The harvester assembly can be integrated into an agricultural harvester such as a baler or combine harvester.