Open AccessThe Effect of Broadcast Nitrogen Fertilization Rates and Placement on the Growth of Green Ash Trees
Author(s) -
Gary Watson
Publication year - 2010
Publication title -
arboriculture and urban forestry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.222
H-Index - 47
eISSN - 2155-0778
pISSN - 1935-5297
DOI - 10.48044/jauf.2010.024
Subject(s) - fertilizer , human fertilization , lawn , sowing , nitrogen , nitrogen fertilizer , agronomy , environmental science , soil fertility , chlorophyll , mathematics , horticulture , biology , botany , chemistry , soil water , soil science , organic chemistry
Tree responses to slow-release nitrogen fertilization treatments were limited, but application of fertilizer to the inner half of the root zone improved caliper growth and relative chlorophyll content. Concentrating nitrogen fertilizer applications closer to the base of the tree may be able to take advantage of naturally higher root density, in addition to any further root stimulation resulting from the applied fertilizer treatment. The study site was moderately fertile, as are many urban landscapes where lawn and planting beds surrounding trees are fertilized. The pre-existing level of fertility may have contributed to the limited growth response to the nitrogen applications.