An agricultural implement comprising: a crop inlet with infeed rolls to collect picked-up crop; a crop pick-up, comprising: - a reel with pick-up fingers operable to pick up crop from the field, - an auger operable to transport the picked-up crop to the crop inlet; - drive means operable to rotate the reel in a pick-up direction and the auger in a collection direction for picking up and transporting the crop, and also operable to rotate the auger in a retrieval direction for retrieving already collected crop when a foreign object is detected in the collected crop; and - ejection means operable to actively rotate the reel in an ejection direction for ejecting the retrieved crop from the crop pick-up. a control unit, coupled to the infeed rolls and to the drive means and the ejection means of the crop pick-up, configured such that, when a foreign object is detected in picked-up crop, the infeed rolls and the auger and the reel of the crop pick-up are actively rotated in such a manner that the crop already collected by the crop pick-up is retrieved and ejected, characterized in that the control unit is configured so that, when the foreign object is detected, first the infeed rolls and the auger of the crop pick-up are rotated in the retrieval direction, and the reel of the crop pick-up is actively rotated in the ejection direction after a predetermined time interval only. a crop inlet with infeed rolls to collect picked-up crop; a crop pick-up, comprising: - a reel with pick-up fingers operable to pick up crop from the field, - an auger operable to transport the picked-up crop to the crop inlet; - drive means operable to rotate the reel in a pick-up direction and the auger in a collection direction for picking up and transporting the crop, and also operable to rotate the auger in a retrieval direction for retrieving already collected crop when a foreign object is detected in the collected crop; and - ejection means operable to actively rotate the reel in an ejection direction for ejecting the retrieved crop from the crop pick-up. - a reel with pick-up fingers operable to pick up crop from the field, - an auger operable to transport the picked-up crop to the crop inlet; - drive means operable to rotate the reel in a pick-up direction and the auger in a collection direction for picking up and transporting the crop, and also operable to rotate the auger in a retrieval direction for retrieving already collected crop when a foreign object is detected in the collected crop; and - ejection means operable to actively rotate the reel in an ejection direction for ejecting the retrieved crop from the crop pick-up. a control unit, coupled to the infeed rolls and to the drive means and the ejection means of the crop pick-up, configured such that, when a foreign object is detected in picked-up crop, the infeed rolls and the auger and the reel of the crop pick-up are actively rotated in such a manner that the crop already collected by the crop pick-up is retrieved and ejected, characterized in that the control unit is configured so that, when the foreign object is detected, first the infeed rolls and the auger of the crop pick-up are rotated in the retrieval direction, and the reel of the crop pick-up is actively rotated in the ejection direction after a predetermined time interval only.