Sharp mower blades increase fuel efficiency
Most lawn-care operators realize that a dull mower
blade will shred grass blades, leaving a tattered appearance. If that's not bad
enough, dull blades have also been shown to increase disease incidence in some
Another supposed drawback to dull mower blades is that
tattered grass blades promote greater water use, presumable through increased
evaporation through the exposed tissue.
However, University of Nebraska researchers found that
turfs mowed with a sharp mower blade used 33 percent MORE water than those mowed
with the dull mower. This may have been due to the slower growth that occurred
with dull blade damaged. Not that this makes a good argument for mowing with
dull blades, considering the remaining drawbacks.
The Nebraska researchers found another interesting
result during this study: Mower fuel consumption was 22 percent less with a
sharp blade than with the dull one. In these times of high fuel prices, that
alone should be incentive to keep your blades sharp.
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