Edmund Skweres required 11 stitches in a deep wound on his right hand after it got caught in machinery as he worked for Southampton-based horticultural firm AE Roberts in February 2011.
At the time of the incident, the 52-year-old was attempting to clear rubbish from around a root packing machine when his arm came into contact with the moving parts of the equipment.
The device's metal drive wheel cut through his glove and lacerated the skin between his finger and thumb.
Mr Skweres was subsequently off work for a month and, after A E Roberts admitted breaching health and safety legislation, could now be in line to receive a compensation award.
Michael Baxter of the Health and Safety Executive observed: "Mr Skweres suffered a painful and entirely preventable injury for the sake of a simple guard that would have prevented access to the hydraulic drive mechanism."
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