Great Plains 1300 13-Foot Material Rate - Manual (Page 7)

Great Plains Manufacturing, Inc. Table of Contents Metric Charts Main Box Seed Rate 5
2014-03-10 Table of Contents Metric Charts 175-157B
Reading a Seed Rate Chart
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.
The example presumes you desire to
plant:
Barley at 60 pounds per acre with a 7.5 inch 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.
10. 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 3.
In the example, this is
Drive Type 2 (34T sprocket).
11. Find your row spacing in the far left column.
12. Locate your desired seed rate in the table row for
your row spacing.
In the example the rate closest to 60 is:
64
13. 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 4.
In the example, start with a handle setting of:
50 (or interpolate to 47),
and calibrate. When a target rate falls halfway
between handle settings, you can adjust the handle
slightly to compensate, as in the example, but
calibration is apt to result in further adjustment
anyway.