Piotr Korycki picks up a handful of wheat and watches as the yellow grains run through his fingers. All around him, grain is piled high in a warehouse on his farm north of the Polish capital: hundreds of tons of wheat, rye and corn left over from last year’s harvest that he is unable to sell for a profit. With a new harvest on the horizon, he feels pressure to sell what he has to prevent it from going bad. “The situation on our markets is really very, very tough,” Korycki said. “And if nothing changes, in a year or two it could become critical.” Korycki’s frustrations have pushed him to help o…