A harvester comprising: a harvester assembly comprising: a feeder assembly; a bottom floor assembly; and a crop collection channel positioned therebetween, such crop collection channel having a depth defined by the distance between the feeder assembly and the bottom floor assembly; wherein the feeder assembly comprises a rotor rotatable positioned on a transverse axis between a first and a second sidewall (222a, 222b), and a first pair of slotted guides oppositely positioned on the first and the second sidewalls; wherein the bottom floor assembly comprises: a first pair of hydraulic cylinders; a bottom floor frame comprising a first and a second framewall and at least one face extending laterally across a top portion of the bottom floor assembly, such bottom floor frame oppositely positioned proximate to the feeder assembly; and one or a plurality of bottom floor plates, covering the at least one face and comprising a concave curvature that defines at least a portion of the bottom of the crop collection channel; characterized in that the bottom floor assembly further comprises a second pair of hydraulic cylinders; the first pair of hydraulic cylinders, set to a first predetermined amount of compression, provide a variable range of motion, thereby moving a front portion of the bottom floor assembly along the length of the first pair of slotted guides and adjusting the depth of the crop collection channel at the front portion of the at least one face during the first operational mode; and the second pair of hydraulic cylinders, set to a second predetermined amount of compression, provides a variable range of motion, thereby pivoting the bottom floor assembly at a pivot point positioned at the front portion of the bottom floor assembly and adjusting the depth of the crop collection channel at the rear-most section of the at least one face during at least the first operational mode. a harvester assembly comprising: a feeder assembly; a bottom floor assembly; and a crop collection channel positioned therebetween, such crop collection channel having a depth defined by the distance between the feeder assembly and the bottom floor assembly; wherein the feeder assembly comprises a rotor rotatable positioned on a transverse axis between a first and a second sidewall (222a, 222b), and a first pair of slotted guides oppositely positioned on the first and the second sidewalls; wherein the bottom floor assembly comprises: a first pair of hydraulic cylinders; a bottom floor frame comprising a first and a second framewall and at least one face extending laterally across a top portion of the bottom floor assembly, such bottom floor frame oppositely positioned proximate to the feeder assembly; and one or a plurality of bottom floor plates, covering the at least one face and comprising a concave curvature that defines at least a portion of the bottom of the crop collection channel; a feeder assembly; a bottom floor assembly; and a bottom floor assembly; and a crop collection channel positioned therebetween, such crop collection channel having a depth defined by the distance between the feeder assembly and the bottom floor assembly; wherein the feeder assembly comprises a rotor rotatable positioned on a transverse axis between a first and a second sidewall (222a, 222b), and a first pair of slotted guides oppositely positioned on the first and the second sidewalls; wherein the bottom floor assembly comprises: a first pair of hydraulic cylinders; a bottom floor frame comprising a first and a second framewall and at least one face extending laterally across a top portion of the bottom floor assembly, such bottom floor frame oppositely positioned proximate to the feeder assembly; and one or a plurality of bottom floor plates, covering the at least one face and comprising a concave curvature that defines at least a portion of the a first pair of hydraulic cylinders; a bottom floor frame comprising a first and a second framewall and at least one face extending laterally across a top portion of the bottom floor assembly, such bottom floor frame oppositely positioned proximate to the feeder assembly; and one or a plurality of bottom floor plates, covering the at least one face and comprising a concave curvature that defines at least a portion of the bottom of the crop collection channel; characterized in that the bottom floor assembly further comprises a second pair of hydraulic cylinders; the first pair of hydraulic cylinders, set to a first predetermined amount of compression, provide a variable range of motion, thereby moving a front portion of the bottom floor assembly along the length of the first pair of slotted guides and adjusting the depth of the crop collection channel at the front portion of the at least one face during the first operational mode; and the second pair of hydraulic cylinders, set to a second predetermined amount of compression, provides a variable range of motion, thereby pivoting the bottom floor assembly at a pivot point positioned at the front portion of the bottom floor assembly and adjusting the depth of the crop collection channel at the rear-most section of the at least one face during at least the first operational mode.