Christmas tree cultivation has shifted toward the production of higher-quality trees, increasing land quality expectations as well. Indeed, some species of tree, such as the Fraser fir, are unable to grow on low-quality, marginal farmland. Flat or gently rolling land is preferred to that with steep slopes and inclines, which is prone to erosion and fluctuations in fertility. Noticeable obstructions, such as rocks, fences or significant underbrush, are also undesirable. Like all crops and plants, Christmas trees require a specific set of nutrients to thrive. There are 16 elements crucial for growth; of those, three are obtained through air and water: hydrogen, carbon,
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