PT  - JOURNAL ARTICLE
AU  - Perry, Ed
AU  - Hickman, Gary W.
TI  - a Survey to Determine the Leaf Nitrogen Concentrations of 25 Landscape Tree Species
AID  - 10.48044/jauf.2001.017
DP  - 2001 May 01
TA  - Arboriculture & Urban Forestry (AUF)
PG  - 152--159
VI  - 27
IP  - 3
4099  - http://auf.isa-arbor.com/content/27/3/152.short
4100  - http://auf.isa-arbor.com/content/27/3/152.full
SO  - JOA2001 May 01; 27
AB  - A survey was conducted to determine the concentrations of leaf nitrogen in 25 landscape tree species. Leaf samples were taken from mature, healthy trees in the landscape and analyzed for percent (total) nitrogen. Concentrations ranged from 1.0% (dry weight basis) for deodar cedar (Cedrus deodara) and Southern magnolia (Magnolia grandiflora) to 3.6% for white mulberry (Morus alba). The leaf nitrogen levels determined by the current study were compared to two other published surveys. From a practical standpoint, the list of tree species and their corresponding minimum leaf nitrogen values from visually healthy trees will allow arborists and landscape maintenance professionals to more effectively use leaf analysis for diagnosing nitrogen deficiency. The information can also be used for designing fertilizer programs, much as critical leaf nutrient level guides are currently used in the fruit and nut tree industries.