Christmas tree cultivation and oxygen. Nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, boron, copper, chlorine, manganese, molybdenum, iron, and zinc are obtained from the soil. If the necessary elements are not available in the local soil, nutritious fertilizers are used. Other important soil considerations include pH and drainage. Certain types of soil are preferable, depending on the type of tree. Pine trees are usually better adapted to a sandy or sandy loam soil, while white spruce trees and fir trees, such as the Douglas-fir, prefer fine-texture loams and clay loam soils. Some trees grow well in all types of soil, but in any case,
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