They're wedging the bale to insert a tracker in it. The trackers look something like - https://images2.opb.org/c_limit%2Ch_1000%2Cq_90%2Cw_640/news_tracker_clo

They're wedging the bale to insert a tracker in it. The trackers look something like - https://images2.opb.org/c_limit%2Ch_1000%2Cq_90%2Cw_640/news_tracker_close_up_-1_g00ceo.jpg https://images2.opb.org/c_limit%2Ch_1000%2Cq_90%2Cw_640/news...