of Rhode Island GreenShare Factsheets
The proper application of any lawn management materia--seed, fertilizer,
limestone or a pesticide--can only be accomplished with a properly-calibrated
spreader. Both the spreader and the material being applied should
come with specific directions for spreader settings. However, in
the event that such directions are not available, the directions
below can be used to calibrate a drop-type spreader for any material.
1. Make a V-shaped trough of heavy cardboard, wood or tin. Fasten
this trough beneath your spreader to catch the material you want
to spread. A trough made from a piece of eaves works well--simply
close off the ends with masking tape.
2. Set the spreader on a manufacturer-suggested number and cover
a 100 square foot area. If your spreader is:
1 foot wide,
go forward 100 feet
1-1/2 feet wide,
go forward 66 feet
2 feet wide,go
forward 50 feet
3 feet wide, go
forward 33 feet
4 feet wide, go
forward 25 feet
3. Shut the spreader off when you have traveled the right distance.
Weigh the collected material and multiply by 10. This will give
you the amount applied for 1,000 square feet. Most material recommendations
for lawn use are given on a 1,000 square foot basis.
4. If you applied too much, shut the spreader down and try again.
If you applied too little, open the spreader up and try again.
If it came out just right, record the setting number with the material
used so you don't forget it for the next application.
Note: How materials flow varies depending upon the carrier
used, storage conditions, etc. To avoid damage and to do an effective
job with a new or an old material, it is always best to calibrate
Most manufacturers will provide instructions for calibrating
their brand of equipment upon request. For this information, check
with the dealer from whom the spreader was purchased or contact
the manufacturer directly.
Adapted from the University
of Massachusetts Extension, 2000
are poisonous! Read and follow all safety precautions on labels.
Handle carefully and store in original containers out of reach
of children, pets or livestock. Dispose of empty containers
immediately, in a safe manner and place. Pesticides should never
be stored with foods or in areas where people eat.
When trade names are used for identification, no product endorsement
is implied, nor is discrimination intended against similar materials.
Be sure that the pesticide you intend to use is registered for
the state of use.
The user of this information assumes all risk for personal injury
or property damage.
information, call the URI CE Gardening and Food Safety Hotline
at 1-800-448-1011 or (401)874-2929 from outside Rhode Island;
Monday-Thursday between 9 am and 2 pm.
of Rhode Island Cooperative Extension provides equal program