Christmas Tree Science
Top of Mind with Julie Rose - Season 1, Episode 1491 , Segment
3
Civilian DoD, Christmas Songs, Homemade Roller Coaster
Episode: Civilian DoD, Christmas Songs, Homemade Roller Coaster
- Dec 15, 2020 9:00 pm
- 16:01
In the quest to grow the perfect Christmas tree, pinecones are a big problem. Guest: Bert Cregg is a professor of tree physiology and horticulture at the University of Michigan.