Knowledge and preparation are Safety Keys
Whether you are trimming a manicured lawn or slicing through saplings, the same basic principles of operational safety apply:
You should be thoroughly familiar with the gardening equipment, their operating characteristics, capacity, and safety features...
To the greatest extent possible, the work site needs to be prepared in advance of the work.
You are responsible for your personal safety and that of others. Make sure that there are no bystanders, children or pets in the work area.
Safe equipment use depends on gaining a thorough understanding of each machine's capacity and operating characteristics. Be sure to find out what materials a particular mower can safely cut. For example, don't try to cut brush with a rotary mower designed only for grass, because you may be exposed to hazards caused by machine failure. The best way to learn about a machine's capabilities and safety features is to study the operator's manual in detail. You must know how to operate your mower, trimmer, brushcutter and various other products. Determine the purpose of all the controls, gauges, and dials. Learn the safe speed, slope capabilities and operating clearances of the equipment.