NAT WILLIAMS Illinois Farmer Today Charleston city worker Travis Campbell uses a drip torch to start a controlled burn in one of the natural vegetation plots at Woodyard Conservation Area at Lake Charleston Tuesday morning. The city conducted controlled burns to help the native plants at the Woodyard area and at two other locations at Lake Charleston Tuesday. DAVE FOPAY, JOURNAL GAZETTE & TIME-COURIER There may be a day when farmers will no longer hear the roar of internal combustion engines or wear the faint scent of diesel fuel. Electric tractors are in their infancy, but manufacturers are taking a serious look at them. They face some impediments, acceptance not the least among them.