PT  - JOURNAL ARTICLE
AU  - Smiley, E. Thomas
AU  - Fraedrich, Bruce R.
AU  - Booth, Donald C.
TI  - Comparison of Trunk Injected and Soil Applied Macronutrients
AID  - 10.48044/jauf.1991.071
DP  - 1991 Dec 01
TA  - Arboriculture & Urban Forestry (AUF)
PG  - 322--324
VI  - 17
IP  - 12
4099  - http://auf.isa-arbor.com/content/17/12/322.short
4100  - http://auf.isa-arbor.com/content/17/12/322.full
AB  - Macronutrients (N,P,K,) deficient willow oaks (Quercus phellos) grown in parking lot islands were fertilized by trunk or soil injection. Foliar nitrogen levels improved significantly in soil fertilized trees. Foliar color improved most in the soil fertilized trees and not at all in the controls.