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,
Douglas County search and rescue Douglas County search and rescue Douglas County Search and Rescue is an all-volunteer organization in Douglas County within Douglas County Sheriff's Office. With approximately sixty active members year round, Douglas County's Search and Rescue (Douglas SAR) responds to searches for missing children and adults, evidence and other search requests in the county and on mutual aid calls anywhere in the state of Colorado. Douglas SAR is a mountain rescue Type I certified team able to handle the toughest terrain and remain out in the field without resupply for extended periods. Today the team, headquartered in Castle Rock, CO at "13S