Abstract: A self-coherent particulate magnetic mulch to protect selected ground areas from erosion by wind and/or rain and suppress the growth of undesired vegetation. The mulch is composed of magnetic particles having a rough diameter ranging from about 1 millimeter to about 25 millimeters, preferably from about 6 millimeters to about 13 millimeters. A protective ground cover is formed by applying the particulate magnetic mulch to the area to be protected at a suitable thickness.

Abstract: A magnetic article has a magnetic layer having magnetized particles dispersed in a natural or synthetic resin binder and an adjacent high-permeability layer having high-permeability particles dispersed in a natural or synthetic resin binder. The magnetic article may be prepared by co-extruding a mixture of magnetizable particles in a binder and high-permeability particles in a binder through a single die to produce an integral gradient function article having a region of high concentration of magnetizable particles adjacent to one surface of the article and a region of high concentration of the high-permeability particles adjacent to another surface of the article, and magnetizing at least a portion of the magnetizable particles.