Geraete zum Auffinden und Bewerten von holzzersetzender Faeule in Baeumen

Several instruments, the Sound Impulse Hammer for the detection and confirmation of suspected internal defects, the Resistograph M for defect detection and quantification of internal defects and three types of Fractometer for the measurement of elasticity and fracture strength of wood, have been recently developed based on the Visual Tree Assessment (VTA) method to assist arboriculturists, landscape architects and planners to supplement their observations where a tree's stability and durability is suspect. This paper concentrates on how these instruments are used in tree inspections and is based on the author's experience of their use in the field. (orig.)SIGLEAvailable from TIB Hannover: ZA 5141(5661) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman