Christmas tree cultivation tractors, and shaper sheers. Mechanized planters, at a cost of about US$4,000, are not essential but a work-saving luxury for farmers. Farmers can purchase seedlings, the lifeblood of a Christmas tree farm, from nurseries. One farmer in Oregon purchased seedlings for between US$200–300 per 1,000 plants. The farmer, a wholesaler, sold his final products for about $20 each; after the cost of the trees and other expenses, a profit of $2–3 per tree. The best-selling species in the North American market are Scots pine, Douglas-fir, noble fir, balsam fir, Fraser fir, Virginia pine, and eastern white pine, although other types
Douglas E. Noble Grant in 2011 for research related to the Samuel Freeman House, a residence designed in 1924 by Frank Lloyd Wright. Together, Noble and Kensek have received several awards for their innovative "NotLY: Not Licensed Yet" support system for individuals preparing for the Architect Registration Examination. In addition to completing several buildings as an architect, Noble is a widely recognized leader in championing and mentoring emerging architecture professionals. Noble founded the Ph.D. program at USC Architecture, and he has published articles and organized symposia on doctoral education in architecture. Noble completed a Ph.D. in the Design Theories and Methods (DTM) group