/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: crboyer https://public.slidesharecdn.com/v2/images/profile-picture.png Dr. Cheryl R. Boyer, Associate Professor and Extension Specialist, Ornamental Nursery Crops and Garden Centers, Department of Horticulture, Forestry and Recreation Resources, Manhattan, Kansas