PT - JOURNAL ARTICLE AU - Costello, Laurence TI - Urban Trees and Water: An Overview of Studies on Irrigation Needs in the Western United States and a Discussion Regarding Future Research AID - 10.48044/jauf.2013.018 DP - 2013 May 01 TA - Arboriculture & Urban Forestry (AUF) PG - 132--135 VI - 39 IP - 3 4099 - http://auf.isa-arbor.com/content/39/3/132.short 4100 - http://auf.isa-arbor.com/content/39/3/132.full AB - A review of the literature concerning water needs and water loss from landscape plants is presented. Studies conducted in the field, using lysimeters, and in containers are summarized and discussed. In some studies, crop coefficients or water use coefficients are included. A discussion of the variability found in research methods and the need for a standardized protocol for tree water needs studies is presented.