Fig.-.J. 
Location of the two test sites in Grisons, Switzerland. 
Iigu_2 
Example of IR-thermography (Reconofax-VI, 3-5 u, 16.9.1971, daytime) of non- 
forested upper part of DISCHMA-VALLEY test site. 
Landforms (end moraines, fans etc.), hydrographic features and the diffe 
rence between grass and dwarf-shrub are well recognizable. 
(Thermography by LAD, military air base, Dlibendorf, Switzerland)