RT Journal Article SR Electronic T1 Using Soil and Foliar Analysis to Diagnose the Nutritional Status of Urban Trees JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 17 OP 24 DO 10.48044/jauf.1995.004 VO 21 IS 1 A1 Kopinga, Jitze A1 van den Burg, Jan YR 1995 UL http://auf.isa-arbor.com/content/21/1/17.abstract AB During the past years, increased knowledge about the nutritional status of solitary trees has led to the development of soil and foliar analysis as a tool for the assessment of both chloride damage and nutrient deficiencies in The Netherlands. Data on threshold levels per tree species and element proportions are summarized. This enables the arborist to distinguish between various causes that exhibit similar symptoms (such as potassium deficiency, chloride damage and drought). The state of the art for the use of of soil and foliar analysis in arboriculture is briefly discussed and threshold values are presented.