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,
Fraser Canyon Gold Rush "humbug". Many returned to San Francisco. A continuing influx of newcomers replaced the disenchanted, with even more men storming the route of the Douglas Road to the upper part of Fraser Canyon around Lillooet; others got to the upper canyon via the Okanagan Trail and Similkameen Trail, and to the lower Canyon via the Whatcom Trail and the Skagit Trail. All these routes were technically illegal since the Governor required that entry to the colony to be made via Victoria, but thousands came overland anyway. Accurate numbers of miners, especially on the upper Fraser, are therefore difficult to reckon. During