Agriculture and Agri-Food Canada · When it comes to growing potatoes, small changes to farming practices can lead to big impacts. Dr. Judith Nyiraneza, a soil scientist on Prince Edward Island, has found a way to help farmers make their potato production more sustainable. Her research shows that farmers can cut nitrogen fertilizer use by 25% without sacrificing potato yield. Even better, these changes, along with the right choice of crop rotation, can help reduce the greenh