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,
James Douglas, Lord of Douglas James Douglas, Lord of Douglas Sir James Douglas (also known as Good Sir James and the Black Douglas) (c. 1286 – 25 August 1330) was a Scottish knight and feudal lord. He was one of the chief commanders during the Wars of Scottish Independence. He was the eldest son of Sir William Douglas, known as "le Hardi" or "the bold", who had been the first noble supporter of William Wallace (the elder Douglas died circa 1298, a prisoner in the Tower of London). His mother was Elizabeth Stewart, the daughter of Alexander Stewart, 4th High Steward of Scotland, who died