![Spreader Settings](/images/new-backgrounds/101794/10179415x1.webp)
Spreader Settings
When determining correct spreader settings, consider:
■Effective Pattern Width: The actual width in which the material is applied. Label instructions and settings are useful guides, but only an actual test can provide a reliable and accurate pattern width.
■Application Rate: The amount of material applied per 1000 square feet (before you can determine application rate, you must know the effective pattern width).
Effective Pattern Width
You can make a simple visual pattern test by operating the spreader over a
A more accurate method is to place a row of disposable aluminum cake pans about 1 foot apart on centers as shown in Figure 11. Set the rate control at the middle setting (see Operation, Step 3, Figure 11,) and make three or four passes in the same direction. See Figure 11.
Pour the material collected in each cake pan into individual bottles or jars of the same size, then set them side by side in the order they were collected and inspect the containers.
The Effective Pattern Width is the distance out from the spreader to a point where the amount of material is 1/2 the amount in the center pans.
Application Rate
Calculate application rate as follows:
1.Determine the Effective Pattern Width (see the previous page).
For example:
a. Divide the weight of a container of material by the recommended
b. Multiply the result by 100 (add two zeros).
For example:
■According to the label on the container, 25 pounds of material will cover 5000 square feet.
■Calculate average coverage requirement–
25 lbs 5000 000.5 100
0.5 pounds per 100 square feet
3.Measure out an area of 100 square feet (10 by 10 feet).
Weigh out 15 to 20 pounds of material and spread it over the measured 100
Repeat the test until the application rate is correct.
Space for
wheel track
Direction of
Operation
Rate Setting Conversion
The following is a comparison of the settings of a Shindaiwa 75RS with the equivalent approximate settings of other spreaders.
Shindaiwa |
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75RS | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
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Scotts |
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Speedy Green | - | - | 2 | - | 3 | - | 4 | - | 5 | - | 6 | - | 7 | - | 8 | - | - |
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PrizeLAWN |
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G | H | J | K | M | N | N1/2 | O | P1/2 | Q | R | S | T | U | V | X | Z | |
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Lesco |
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E | F | G | H | I | J | K | L | - | - | M | N | O | - | P | R | S | |
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Scotts |
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R8A/SR1/AP | I | J | L | M | O | P | - | Q | - | S | T | U | - | V | W | X | Z |
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| Fertilizer | Bag Rate | Approximate | Spread | |
| pounds of material used per | Setting | Width | ||
| Particle Size | ||||
| 1000 sq.ft. of coverage |
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This charts | LARGE, | 5 |
| 6 | 12 |
provides | HEAVY | 10 |
| 9 | 12 |
approximate | PARTICLES | 15 |
| 11 | 12 |
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settings of a |
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MEDIUM, | 5 |
| 5 | 10 | |
Shindaiwa | MIXED | 10 |
| 7 | 10 |
75RS when | PARTICLES | 15 |
| 9 | 10 |
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only the | SMALL | 1 |
| 2 | 10 |
product | PARTICLES | 2 |
| 4 | 10 |
weight, area | (NITROGEN) | 3 |
| 5 | 10 |
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coverage, or | 5 |
| 6 | 8 | |
inspection of | PARTICLES, | 10 |
| 9 | 8 |
the material | SOME FINES | 15 |
| 11 | 8 |
is available. |
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LIGHT | 5 |
| 4 | 6 | |
| WEIGHT | 10 |
| 5 | to |
| PARTICLES | 15 |
| 6 | 8 |
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Effective Pattern Width is deter- mined to be 10 feet.
2.Determine the coverage require- ment of the material to be spread in pounds per 100 square feet. This can be calculated as follows:
Space pans
1 foot on centers
Figure 11
Conversions should only be used as guidelines for establishing rate settings. To obtain the most accurate application rate, follow the procedures described in the Effective Pattern Width and Application Rate sections.
The settings shown here are only approximations and will vary with walking speed, turf condition, humid- ity, etc. Warranties and guarantees of actual coverage or uniformity are neither expressed nor implied.
6 | 7 |