A. Dohrenbusch et al., DEVELOPMENT AND CONSTRUCTION OF A LIGHT M EASURING SYSTEM TO DETERMINE THE PHOTOSYNTHETIC USABLE RADIATION, Allgemeine Forst- und Jagdzeitung, 166(8), 1995, pp. 154-160
Based on the demands on a light measurement system for forest ecologic
al research, the construction and function of a self-developed instrum
ent is described. It is characterized with a spectral sensitivity adju
sted to the photosynthetic effectiveness of plants (Fig. 1). The compa
ct and low energy demanding instrument makes direct readings possible
as well as integrating registration of data (Fig. 3). The methodical p
roceeding to determine the relative light intensity is presented.