LINCOLN, Neb. (AP) _ Lawmakers may tackle the issue of how to pay for solutions to some of the Nebraska's water problems. A legislative committee announced on Tuesday that it had advanced a bill (LB862) to the Legislature that would let more natural resources districts levy per-acre taxes on irrigated farmland. Revenue could be used for measures to boost river flows. If amended as proposed, the bill would allow districts that have developed water-management plans with the state to levy the tax. A current law allows NRDs only in the Republican River basin to levy the tax. But it is not used because of a pending lawsuit that says the law is unconstitutional because it is limited to that basin.