Northern Prairie Wildlife Research Center
We recommend that mowed or hayed firebreaks be extremely wide. The cut vegetation should be removed prior to setting the fire, and the prescription should call for a constant wind direction and speed.
Although this type of firebreak can be established several days in advance, more workers and perimeter surveillance are necessary to prevent fires from escaping by burning across vegetation that remains after mowing or haying, even though the fuel may be low to the ground.