(NAFB.com) – House lawmakers opened debate this week on a long-delayed farm bill, with Republican leaders hoping to pass the sweeping legislation by noon Thursday, House Agriculture Committee Chairman Glenn ‘G.T.’ Thompson told farm broadcasters. The five-year measure would set national policy for commodity programs, crop insurance, conservation, and nutrition assistance. Thompson said he wants the bill approved by the House before midday Thursday, sending it to the Senate for further negotiations. One of the most closely watched issues is a proposal to allow year-round nationwide sales of E15 gasoline, a higher-ethanol blend backed by corn growers and biofuel groups. Supporters say it would expand corn demand and lower fuel prices, while some refining interests oppose the change. Lawmakers are also expected to debate pesticide liability language and updates to farm safety-net programs. Producer groups have pushed for stronger commodity supports as low crop prices and high input costs strain farm finances. Thompson said that 140 amendments were filed ahead of floor consideration, setting up a lengthy debate.