A large, truck-mounted screen was constructed to aid in measurement of total leaf area of individual honey mesquite (Prosopis glandulosa Torr.) trees. The screen, which measured 4.6 m × 6.2 m, was constructed with a white tarp supported by a PVC and steel frame, and mounted via steel brackets to one side of a crew-cab truck. To alleviate problems with wind and to facilitate transport, the tarp was attached only at the top of the frame and could be raised and lowered as required. The screen could be transported in the unassembled condition using a standard truck transport frame. The assembled screen was used in a natural rangeland setting to provide a consistent background for photography of individual trees. A 35-mm camera and a portable VCR recorder were used to obtain 2 dimensional images of the tree canopy, which were then digitized. These values were related to whole plant leaf area by harvesting entire trees. A crew of 4 was required to assemble the screen and photograph about 35 trees within 4 hours. This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries. The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. Migrated from OJS platform August 2020
Scholarly peer-reviewed articles published by the Society for Range Management. Access articles on a rolling-window basis from vol. 1, 1948 up to 5 years from the current year. Formerly Journal of Range Management (JRM). More recent content is available by subscription from SRM.