Christmas tree cultivation species are grown as Christmas trees, although a handful of varieties stand out in popularity. In the United States, Douglas-fir, Scots pine and Fraser fir all sell well. Nordmann fir and Norway spruce sell well in the United Kingdom, the latter being popular throughout Europe. Like all conifers, Christmas trees are vulnerable to a range of pests. The final stage of cultivation, harvesting, is carried out in a number of ways; one of the more popular methods is the pick-your-own tree farm, where customers are allowed to roam the farm, select their tree, and cut it down themselves. Other farmers
Douglas Fraser five days later and ratified on September 23 contained restrictions on mandatory overtime, a comprehensive health-and-safety program, significant improvement to the early retirement plan, and a new dental care benefit. A new streamlined arbitration process was also negotiated, which reduced the time for resolving grievances. Fraser was president of the UAW from 1977 to 1983. He was elected president after Woodcock had reached the mandatory retirement age of 65, according to the UAW constitution. He is best known for his role in negotiating a greater voice for the union in corporate governance with Chrysler during the company's 1979 bankruptcy crisis