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,
Tree of Life (craft) luxurious pieces began to be produced. This type of work is typified by the tree of life, especially those that are not religious in function. These non-religious trees have themes such as death or spring. The construction of clay tree sculptures with the Biblical theme of the Garden of Eden began in Izucar de Matamoros in Puebla State and spread to other areas, particularly to Metepec, Mexico State, which distinguished their trees by painting them in bright colors. The tree sculptures have become emblematic of this municipality, and are part of a clay sculpture tradition found only here. Other common