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 in public schools. Despite resistance from both staff and members, he began initiatives within the UAW and the auto industry to recruit more minorities and women. He also pushed for national health insurance. Fraser retired as UAW president in 1983. He was an adjunct professor at Wayne State University for many years, teaching labor relations and labor history. A major research and study center, the Douglas A. Fraser Center for Workplace Issues, was named after him. Fraser received The International Center in New York's Award of Excellence for his significant contributions to life in America. Douglas Fraser died on February