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A Disk Camera System for Automatic Recording of Visual Data: Snow Depth in Field Plots. A. H. Alberga, Department of Meteorology, University of Wisconsin, Madison 53706; M. Marosy(2), C. B. Tanner(3), and C. D. Upper(4). (2)Department of Plant Pathology, University of Wisconsin, Madison 53706, (3)Department of Soil Science, and ARS/USDA, University of Wisconsin, Madison 53706, (4)Department of Plant Pathology, University of Wisconsin, Madison 53706. Phytopathology 77:927-929. Accepted for publication 1 December 1986. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1987. DOI: 10.1094/Phyto-77-927.

A disk camera triggered by a timed signal provided an inexpensive method of obtaining visual data at a remote site. We used the method successfully to record snow depth and duration in experimental plots during the winters of 19841985 and 19851986. The system can be adapted to accommodate any exposure interval greater than 1 sec, with the time between site visits limited by the number of exposures (15) available per film disk.

Additional keywords: Ascocalyx abietina, data logger, Gremmeniella abietina, Pinus resinosa, Scleroderris.