A divided Lacon City Council tentatively agreed Monday night.to lease 20 acres of city-owned farmland for 35 years to a solar energy developer that has never addressed or met with the council. The panel voted 3-2, with one abstaining, to move forward toward finalizing an agreement with Minnesota-based Solar Energy Ventures in a contract expected to come up for a final vote next month.The company would pay the city $1,300 an acre per year for the 2 megawatt installation, for a total of about $1.3 million over the life of the contract, said Acting Mayor John Wabel,