Great Plains YP2425A Material Rate - Manual (Page 4)

401-626B Table of Contents Metric Charts 2012-02-29
2 YP2425A Table of Contents Metric Charts Great Plains Manufacturing, Inc.
Rate Setting Overview
Setting Planting Rate
There are five or six steps to obtaining the desired
number of seeds per acre, depending on row
configuration. This data applies to the Air-Pro
®
meter
when planting at one
a
seed per disc cell.
1. For your crop, determine your intended population, in
seeds/acre or seeds/hectare. If you know only the
seed spacing or pounds/acre (kg/hectare), consult
the charts on page 2 through page 4.
2. For your crop, population and desired field speed,
verify the suitability and setup of your seed disk:
See “Air-Pro® Meter Disk Selection” on page 5.
3. Set initial seed inlet shutter per seed rate chart.
Set initial meter pressurization per page 8, 9.
4. Sprocket index for staggered twin-row
Twin-row planters, with certain crops, get maximum
benefit with precise seed spacing between adjacent
rows. See “Indexing Fine Adjustment” on page 25.
5. Set meter rate
This is done via the seed monitor. Once data about
your planter is entered, you select the seed rate
directly. Consult the manual for the seed monitor.
6. Check planting rate
See “Checking Planting Rate” on page 10.
Setting Fertilizer Rate
If your planter is equipped with one or both optional
fertilizer manifold systems, it does not include the tank.
If the planter has a Type 2
b
(formerly referred to as a
“starter”) manifold, it may rely on an off-planter pump, or
may use one or two ground drive pumps on the planter.
See “Ground Drive Fertilizer Rate” on page 42 for
ground drive pump configuration.
If the planter has a Type 3
b
(formerly referred to as a
“hi rate”) manifold, it relies on an off-planter pump,
typically the pump on a Great Plains PFC1600 or
PFC2000 tank cart.
Rate setting for the cart pump is found in the cart’s
Operator manual.
Rate is controlled by the pump. Consistent distribution
requires using the correct size orifices in the manifolds. If
the orifice size is too large, flow may not be even across
all rows. If the orifice size is too small, material may be
dumped at the relief valve.
See “Fertilizer Rate” on page 39 for orifice information.
Population Reference Information
Seeds Per Unit
If only pounds/acre (kilograms/hectare) is known, obtain
the population count by multiplying the weight by the
“Kernels per pound” value from the seed container.
Seed Spacing
If only seed spacing is known, use the tables on the next
five pages to determine population.
a. Volumetric planting (more than one seed per cell), is not
covered by this manual.
b. Type 2 and Type 3 are described in the YP2425A
Operator manual, under Setup topic “Fertilizer
Connections”.
Example: Milo
Target rate:
4.5 pounds/acre
Seed density: 14500 seeds/pound
Population: = Rate
× Density
= 4.5 × 14500, or:
65250 seeds/acre
Kernels Per Pound
80,000 Seed Kernels 80,000 Seed Kernels
Bag Weight per Pound Bag Weight per Pound
67.5 lbs 1,185 45.0 lbs 1,778
65.0 lbs 1,231 42.5 lbs 1,882
62.5 lbs 1,280 40.0 lbs 2,000
60.0 lbs 1,333 37.5 lbs 2,133
57.5 lbs 1,391 35.0 lbs 2,286
55.0 lbs 1,455 32.5 lbs 2,462
52.5 lbs 1,524 30.0 lbs 2,667
50.0 lbs 1,600 27.5 lbs 2,909
47.5 lbs 1,684 25.0 lbs 3,200
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