Great Plains 1520P User Manual
Great Plains Mfg., Inc.
Seed Rate Charts for 15ft
Manufacturing, Inc.
www.greatplainsmfg.com
Precision Seeding Systems
The following pages are to assist in the proper setting of seeding rates
for the 1510P, 1520P, 1525P, and 1510HDP precision seeding systems. The rates indicated in the charts for volumetric seeds are
approximate values. To assure the most accurate seeding rate it is
recommended that the drill be calibrated for the desired seed at the
time of planting.
NOTE: These seed rate charts cover all drill models and series openers for the 15 foot precision drills. If your drill is equipped with 10HDP
or 25P series openers, use green wheels for seeding. If your drill is
equipped with 10P or 20P series openers, use black wheels for seeding.
© Copyright 2009 Printed
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Table of Contents
Sprockets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Drive Speed Range Sprockets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Transmission Sprockets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Checking Seeding Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Checking Volumetric Seeding Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Equations for Calibrating Volumetric Seeding Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Checking Singulated Seeding Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Seed Rate Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Seed Rate Application Charts for Finger Meter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Sprocket Index for Finger Meter Pickup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Small Seeds Attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Checking Volumetric Seeding Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Equations for Calibrating Volumetric Seeding Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Small Seeds Attachment Rate Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Microband . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Checking Volumetric Application Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Equations for Calibrating Volumetric Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Microband Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
For Great Plains Singulator Plus Precision Meters:
Singulator Plus Meters (all seeds)
Ezee Glide Plus Talc-Graphite Mix
821-069C bucket, 5 gallon (19 liter)
Ezee Glide Plus Lubricant
To maximize performance of Great Plains metering
systems, it is imperative to use only “Ezee Glide Plus”
lubricant. “Ezee Glide Plus” Talc-Graphite lubricant is
mandatory for all seeds, especially treated or inoculated seed. Thorough mixing of seed and added
lubricant is required.
See page 6 for recommended usage.
Finger Pickup Meters
EZ-Slide Graphite Powder
821-042C bottle, 1 pound (450 grams)
821-060C jug, 5 pound (2.3 kg)
For Finger Pick Up Meters Only
Use only approved Graphite Powder available from
Great Plains Mfg. Inc. or Precision Planting to ensure
proper lubrication of finger pickup corn seed meters.
See page 6 for recommended usage.
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Sprockets
Drive Speed Range Sprockets
3
Select the correct drive speed range sprockets for
your seed by referring to the Seed Rate Charts
beginning on page 6.
Refer to Figure 1
Loosen idler (1) and remove chain (2). Remove
retaining pins (3) from shafts and install speed
range sprockets as necessary.
NOTE: Make sure the correct sprockets have
been installed in the DRIVER and DRIVEN locations as shown.
Reroute chain over sprockets and idlers as
shown. Move idler into chain so chain has 1/4inch slack in its longest span. Tighten idler and install retaining pins.
Set the same drive range sprocket combination
on both gauge wheels.
Driven
3
2
1
Driver
Transmission Sprockets
To change the seeding rate, change the transmission sprocket combination. Refer to the Seed
Rate Charts beginning on page 6.
Refer to Figure 2
Loosen idler plate (1) and remove drive chain (2).
Remove lynch pins (3) from shafts and rearrange
drive and driven sprockets as necessary.
Reroute drive chain over sprockets and idlers as
shown. Move idlers into chain so chain has 1/4inch slack in its longest span. Tighten idlers and
install lynch pins.
Set the same transmission sprocket combination
on both gauge wheels.
Figure 1
Drive Speed Range Sprockets Adjustment
Driven
Driver
3
Transmission Sprockets Adjustment
2
1
Figure 2
3
3
18277
18278
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Checking Seeding Rate
Checking Volumetric Seeding Rate
The seed charts are based on cleaned seed and
9.5L x 15, rib implement tires. Factors including
foreign material, seed treatment, seed size, seed
weight, field conditions and tire pressure will affect seeding rate. Set and check the seeding rate,
then readjust the rate as necessary.
Planted Row
Spacing (Inches)
Number of
Rows
Tire
Revolutions
per Acre for
15ft drills
1. Record the weight of an empty container
large enough to hold seed metered from three
meters for one acre.
2. Place several pounds of seed over three seed
meters on an outside end of the drill box.
NOTE: If drill box is full, shut off sliding seed tubes
to all but three meters on an outside end.
3. Raise drill off ground.
4. Turn gauge wheel a few turns to fill meters
with seed and until seed drops to ground from
all three openers.
5. Place a container under the three openers to
gather seed as it is metered.
6. Using the chart on the right, select your row
spacing and determine the correct number of
revolutions per acre. Turn drive gauge wheel
the selected revolutions for your row spacing.
Check in box to make sure seed tubes have
plenty of seed covering them.
7. Weigh measured seed. Subtract initial weight
of empty container. Divide by three for the
amount metered by each meter, then multiply
by the number of drill openers for the poundsper-acre seeding rate.
7.5” 24 365
10” 18 365
10” 19 346
15” 12 365
15” 13 337
20” 9 365
20” 10 329
30” 6 365
Twin Row 30” 12 365
Twin Row 30” W/S 19 346
8. If seeding rate is different than desired:
• Double check transmission sprocket and
drive range sprocket combinations.
• Check for meter malfunction.
• Check for correct seed meter wheel.
• Check that all three rows are getting seed.
• Refer to Troubleshooting in the operator’s
manual.
9. Readjust transmission and/or range sprockets and repeat test.
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Equations for calibrating volumetric seeding rate:
measured seed - empty container
3 (number of meters measured)
pounds per meter number of openers× pounds per acre=
= pounds per meter
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Checking Singulated Seeding Rate
The seed charts are based on cleaned and sized
seed. Extreme seed size variations, foreign material
and tire pressure will affect the seeding rate. Check
the seed population rate as described below.
1. Adjust the planting depth to a shallow setting.
2. Plant at the desired planting speed for a short
distance.
3. Using the table, determine how many rows
need to be counted.
4. Measure a distance, according to the table, for
the row spacing in the planted area.
5. Count the number of seeds, in the appropriate
number of rows, over the distance measured.
6. Multiply the number of seeds counted by 200 if
measuring for 1/200 acre or by 1,000 if measuring for 1/1,000 acre. This is the plant population
in seeds per acre.
Example 1: Single Row
If you have a 10-inch drill, according to the chart,
three rows must be counted. Measure 17’ 5” and
count the number of seeds in three rows. If the number is, for example, 180, multiply 180 by 1,000.
180 x 1,000 = 180,000 seeds per acre.
Example 2: Twin Row
If you have a Twin Row 30” spacing drill, according to
chart, both rows of the twin row must be counted. Measure 87’ 1” and count the number of seeds in the
parallel row. If the number is, for example, 170, multiply
170 by 200.
170 x 200 = 34,000 seeds per acre.
NOTE: Both rows of the Twin Row count as one row.
7. If the planting population is significantly different
than desired, make the following checks:
• Double check the transmission and range sprocket
combinations. Refer to the seed population chart
for the seed being planted.
• Check the air pressure in the gauge wheel tires.
Refer to “Tire Inflation Chart” in the operator’s manual.
• Refer to Troubleshooting in the operator’s manual.
Seed rate charts
Seed rate charts begin on page 6. The charts give
transmission sprocket combination and drive range
sprockets for row spacing used, to achieve the population or pounds per acre desired. The charts also give
seed spacing for singulated seed and maximum planting speed for both singulated and volumetric seeds.
Each seed chart has a corresponding page showing
the different drive ranges for that seed and a transmission sprocket reference.
NOTE: USE 1/200 ACRE FOR POPULATIONS LESS THAN 100,000 SEEDS/ACRE.
USE 1/1,000 ACRE FOR POPULATIONS ABOVE 100,000 SEEDS/ACRE.
Length of row
Planted row spacing
(inches)
Number of
rows to count
to measure
for 1/1,000
acre
7 1/2” 4 17’ 5”
9 1/2” 3 18’4”
10” 3 17’ 5”
15” 2 17’ 5” 87’1”
19” 2 13’9” 68’9”
20” 1 26’ 2” 130’8”
Twin Row 30’ or 30” 1** 17’ 5” 87’1”
Twin Row 36” or 36” 1** 14’6” 72’7”
Twin Row 38” or 38’ 1** 13’9” 68’9”
Twin Row 40” or 40” 1** 13’1” 65’4”
15” Skip Row or 17 1/7 2 15’3” 76’3”
**Count Twin Row as one row.
Length of
row to
measure for
1/200 acre
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Seed Rate Charts
Seed Lubricants
29248
Singulator Plus Meters (all seeds)
Ezee Glide Plus Talc-Graphite Mix
821-069C bucket, 5 gallon (19 liter)
Ezee Glide Plus Lubricant
To maximize performance of Great Plains metering systems, it is imperative to use only “Ezee Glide Plus” lubricant. “Ezee Glide Plus” Talc-Graphite lubricant is
mandatory for all seeds, especially treated or inoculated
seed. Thorough mixing of seed and added lubricant
is required.
Recommended usage:
For clean seeds other than milo and cotton sprinkle
one cup of Ezee Glide Plus Talc per 4 bushels or units
(170 ml per 100 liters) of seed.
For milo and cotton double the application to
one cup (or more) per 2 bu or units (335 ml per 100
liters) of seed.
Adjust this rate as necessary so all seeds become
coated while avoiding an accumulation of lubricant in the
bottom of the hopper.
For seed with excessive treatment, or for humid planting
environments, increase the rate as needed for smooth
meter operation.
25477
Finger Pickup Meters
EZ-Slide Graphite Powder
821-042C bottle, 1 pound (450 grams)
821-060C jug, 5 pound (2.3 kg)
For Finger Pick Up Meters Only
Use only approved Graphite Powder available from
Great Plains Mfg. Inc. or Precision Planting to ensure
proper lubrication of finger pickup corn seed meters.
Recommended usage:
For finger pickup meters, add one tablespoon (15 ml) of
graphite for each unit of seed corn (80,000 kernels).
In high humidity conditions, or seeds with heavy seed
treatments, increase the application to two tbsp (30ml).
If delivery of seed from the hopper to the finger meter is
an issue, add “Ezee Glide Plus” talc and graphite blend
at a rate of one cup (237ml) per 4 units of seed. Adjust
until issue is resolved.
Irritation and Chronic Exposure Hazard:
Wear gloves. DO NOT use hands or any part of your body to
mix seed lubricant. Wear a respirator when transferring and
mixing. Avoid breathing lubricant dust. Not an acute hazard.
May cause mechanical eye or skin irritation in high concentrations. As with all mineral spills, minimize dusting during cleanup. Prolonged inhalation may cause lung injury. Product can
become slippery when wet.
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Irritation and Chronic Exposure Hazard:
Wear gloves. DO NOT use hands or any part of your body to
mix seed lubricant. Wear a respirator when transferring and
mixing. Avoid breathing lubricant dust. Not an acute hazard.
May cause mechanical eye or skin irritation in high concentrations. As with all mineral spills, minimize dusting during
clean-up. Prolonged inhalation may cause lung injury.
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