The present invention relates to an agricultural baler comprising a bale chamber (9), a feeder duct (23) communicating with the bale chamber for charges of crop material to be transferred from the feeder duct into the bale chamber； and feeder means (25) operable within the feeder duct to accumulate a charge of crop material therein and then stuff that accumulated charge into the bale chamber. There is an opening in the bottom wall of the feeder duct and at least one door (61) hingedly attached to an edge of the opening, said edge being the edge of an end part (71) of the bottom wall of the feeder duct, and the end part of the bottom wall to which the door is hingedly attached, is movably arranged relative to the top wall of the feeder duct.
