Great Plains 2S-2600HDF Operator Manual v2 - Manual (Page 56)

52 2S-2600HD Table of Contents Index Great Plains Manufacturing, Inc.
195-069M Table of Contents Index 2014-02-03
Reading a Seed Rate Chart
1. Find your seed. Charts are in alphabetical order by
seed name. Charts covering more than one seed
may be out of order.
For Rape, see Alfalfa.
For Sudan, see Flax.
This example presumes you desire to plant Barley at
48 pounds per acre with a 7.5in drill.
There are multiple charts for some seeds, and the
rates may overlap. Use the chart where your desired
rate is closest to 50 on the Seed Rate Handle scale.
In our example, that would be Barley chart 2 of 3.
If your seed is not listed, find one with similar size,
shape and density. Density of the test seed used to
develop the chart appears under the right end of the
handle scale values.
2. Note the Drive Type in the upper left corner of the
chart for your seed. This number (1-4) is used to
determine the seed jackshaft sprocket. See page 48.
In the example, this is Drive Type 2 (34T sprocket).
3. Find your row spacing in the far left column.
4. Locate your desired seed rate in the table row for
your row spacing.
In the example, 49 is the closest to 48.
5. Note the Seed Rate Handle setting required, at the
top of the column at that seed rate. This is the initial
value set on the Seed Rate Handle. See page 49.
In the example, start with a handle setting of 40, and
calibrate. When a target rate falls halfway between
handle settings, you can adjust the handle slightly to
compensate, but calibration is apt to result in further
adjustment anyway.