What is the fine-grained topic of the following text: In British Columbia, stump culture Christmas trees and greenery are often produced in combination with cattle in silvopasture agroforestry systems, or combined with shade loving floral greens such as Salal (Gaultheria shallon), Bear-grass (Xerophyllum tenax), Falsebox (Pachistima myrsintes), Sword Fern (Polystichum munitum), Deer Fern (Blechnum spicant), and Evergreen Huckleberry (Vaccinium ovatum). Only return the topic.
Silvopasture agroforestry systems in British Columbia for Christmas tree and greenery production.