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 23, 2008, of complications from emphysema at Providence Hospital in Southfield, Michigan. His life and professional career is documented in historical materials housed within the Walter P. Reuther Library at Wayne State University. His time as UAW president and vice-president and as university professor are chronicled in individual collections. The archival materials include personal correspondence, administrative memoranda, photographs, and other record types. Researchers are encouraged to find the collections at the Walter P. Reuther Library website. Douglas Fraser Douglas Andrew Fraser (December 18, 1916 – February 23, 2008) was a Scottish-American union leader. He was president of the United Auto