To eliminate cogongrass and prevent regrowth, the rhizomes must be destroyed. It has been shown that an integrated approach that combines burning, tillage (mechanical disturbance), and chemical applications provide the best solution for cogongrass management.
1 Force of magnetic field: the force exerted by a magnetic field. 2  Attraction of magnets for iron: the phenomenon of physical attraction for iron, inherent in magnets or induced by a moving electric charge or current. 3  A general term that refers to the effects originating from the electromagnetic interactions of particles.
1) In the case of a bar magnet, outside it, the magnetic lines of forces start from North Pole and end on South Pole. But inside it, the lines of force start from south and end on North Pole. According to definition of direction of lines of force, it is the direction in which a unit north pole would move when placed in a magnetic field. This is true outside the bar magnet but not so inside it.