Abstract: An implantable polycarbonate fastener for holding erosion cloth on the ground. The fastener has a long vertical leg, a shorter vertical leg extending parallel to the long leg, and a horizontal top leg extending between them. The long vertical leg has a tapered lower end segment with a downwardly and outwardly inclined inside face to cause the long leg to bend away from the shorter vertical leg as it is driven down into the ground, thereby making the implanted fastener harder to pull out of the ground.

Abstract: A foot-operated machine for implanting fastener elements in the ground through an erosion cover on the ground. The machine has a hollow vertical column slidably receiving a vertically reciprocable driver connected to a foot pedal on the outside of the column. A post extends up from the column and carries a top cross piece with hand grips which a person may grasp while standing substantially erect with one foot on the foot pedal. A magazine assembly feeds fastener elements individually in succession into the column to be forced down into the ground when the driver is moved down by pushing the foot pedal down. The magazine assembly has a magazine housing located on the opposite side of the column from the foot pedal, a magazine removably received in the magazine housing and slidably supporting a continuous series of the fastener elements, and a spring-biased follower which urges the fastener elements toward the column.