Most everyone knows that we use proteins, carbohydrates and fats for energy. Calories are measurement of a unit of heat or food energy. For example, we can achieve four calories per gram of proteins and carbohydrates, and nine calories per gram from fats.
Tree Variety. Virginia pine (Pinus virginia) is the major Christmas tree species for the acidic soils found in East Texas. A grower can produce a 6- to 8-foot Virginia pine Christmas tree in 3 to 5 years, depending on soil and climatic conditions.
Christmas tree production in Virginia has steadily increased over the last several years. Favorable climate, soils, and proximity to markets place Virginia growers in a highly desirable marketing situation. Christmas trees can be grown throughout the state, and growers are located in all regions. Selection of the proper species, however, is important.