When thick black clouds of smoke billow up over the horizon, the reaction of some Bulloch County residents is to call 911. But during late spring and early summer months, those smoke clouds usually mean someone is burning off a wheat field.Farmers harvesting wheat often follow the crop with another after either harrowing the stubble under or burning the fields to get rid of the wheat stubble, said Bulloch County Extension Agent Wes Harris. Sometimes they will even plant through the stubble, but if they don’t have the right equipment to handle such soil and water conservation measures, burning or harrowing the land is best.With the bumper crop of wheat this year, plentiful rains over late winter and early spring mean an especially thick amount of wheat straw.