OMAHA, Neb. (AP) — Nebraska landowners are seeking new solutions for a millions-year-old phenomenon.

Tons of sand, sediment and silt — some in dunes as high as 10 feet — have been scattered across the eastern half to two-thirds of the state by the March flooding.

In some areas, washed-out cornstalks are 3 to 4 feet deep. Tree limbs are in piles and topsoil has been washed away.

"We have a mountain of sand piled up," Valley farmer Ryan Ueberrhein said to the Omaha World-Herald.

Sediment from Nebraska's rivers and streams has been deposited on nearby flooded land for millions of years. Now U.S....