Great-plains YP825AR Material Rate User Manual download pdf (Page 14)

10 YP825AR Table of Contents Metric Charts Great Plains Manufacturing, Inc.

401-923B Table of Contents Metric Charts 2013-11-11

Checking Planting Rate

Singulated seed charts are based on cleaned and sized

seed singulated with the recommended disk. Extreme

seed size variations, foreign material and, on ground

driver planters, tire pressure can affect the planting rate.

Any material difference between chart and ﬁeld rates

implies a mechanical malfunction, a planter setup error,

unsuitable planting conditions (such as excessive tire

slippage) or extremely worn planter components. You

can verify your setup and planter performance by

measuring seed placement and spacing over a relatively

short distance.

The columns to the right provide example data for a rate

check, in U.S. customary units and a similar example

metric units.

Checking Singulated Rates

1. Determine the sample distance to check. Find your

row spacing in the table at right (metric chart is on

page 90).

2. Note the number of rows to sample. Adjust the

planting depth to a shallow setting on one or two

outside rows (per table). Tie up the press wheel

arms with wire or bungee to prevent furrow closure.

3. For populations above 100 000 seeds/acre, use a

sample size of 1/1000th acre.

For populations below 100 000 seeds/acre, use a

sample size of 1/200th acre.

4. Conﬁgure the planter for the chart rate, either using

the chart settings for sprockets, or, with hydraulic

drive, selecting the rate on the seed monitor.

Figure 3

Furrow Check

29247

USc Example:

Planter: YP825AR-0830

Crop: Soybeans

Density: 3000 seeds/lb

Seed Disk: 403-551D

Target Population:

150,000 seeds/acre

Metric Example:

Planter: YP825AR-0830

Crop: Soybeans

Density: 6614 seeds/kg

Seed Disk: 403-551D

Target Population:

370 657 seeds/hectare

Range Sprockets:

DRIVING: 25

DRIVEN: 15

Transmission Sprockets:

DRIVING: 17

DRIVEN: 23

Range Sprockets:

DRIVER: 25

DRIVEN: 15

Transmission Sprockets:

DRIVER: 17

DRIVEN: 23

Maximum Planting Speed:

8 mph

Maximum Planting Speed:

12.8 kph

Chart Seed Spacing:

1.4 in

Chart Seed Spacing:

3.6 cm

Rows to Sample Length of Sample Run

Row Row 1/1000th 1/200th

Spacing Count Acre Acre

Single Rows

22 in. (56 cm)

1 23 ft. 9 in.

27.6 in. (70 cm)

1 18 ft. 12 in.

29.5 in. (75 cm)

1 17 ft. 8 in.

30 in. (76.2 cm)

1 17 ft. 5 in. 87 ft. 1 in.

Twin Rows

29.5 in. (75 cm)

1 pair 17 ft. 8 in. 88 ft. 6 in.

30 in. (76.2 cm)

1 pair 17 ft. 5 in. 87 ft. 1 in.

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 123 124

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