A tropical grass seems like an unlikely fit for Prince Edward Island, but sorghum Sudan grass is growing in popularity when it comes to preventing disease build-up by rotating other crops through the fields where cash crops like potatoes are grown. 

New research from Agriculture and Agri-Food Canada shows planting the grass could also be of benefit to barley and soybean farmers. 

"It's more related to corn than a lot of the other grasses that we grow in P.E.I.," said Ryan Barrett, research and ag…