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,
Steamboats of the Lower Fraser River and Harrison Lake Puget Sound and the Fraser River. Ships that called in were the "Suprize", "Enterprise", and the "Wilson G. Hunt". At the onset of the Fraser Canyon Gold Rush and the accompanying declaration of the Colony of British Columbia, British colonial Governor James Douglas, was worried about an American monopoly on British trade and thus declared a law preventing steamboat traffic operating under the American flag from conducting trade in the colony. This did two things, it enabled a local shipbuilding industry and, in as a result in some cases, ship owners changed flags and registry to British shipping. Two dominant