GPSを用いた下刈り功程調査

概要

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In this study, we examined the feasibility of using a small global positioning system (GPS) to measure the operationalefficiency of weeding. The study was conducted at the Takakuma Experimental Forest of Kagoshima University. A sixyearold sugi (Cryptomeria japonica) stand was divided into plots of low, medium, and high density (1,000, 1,500, and2,000 trees/ha, respectively). Three individual weeders carried GPS devices while working. At the same time, we observedand documented the time required for weeding. We compared the time recorded by the GPS with that from actualobservation. The weeding time recorded by the GPS was 0.5-4.6% less than that recorded by observation. This was attributedto a later starting time for weeding using the GPS. Weeding with the GPS ended before the observed operations.We found the feasibility of using GPS logger for measurement of the operational efficiency of weeding because the GPSwas accurate for measuring the efficiency of the weeding operations.