Seed-hawk TOOLBAR 2014 Manuel d'utilisateur télécharger pdf (Page 23)

SEED HAWK

2014 TOOLBAR OPERATOR’S MANUAL SEED HAWK

2014 TOOLBAR OPERATOR’S MANUAL38

4.10.1 Loose Soil Conditions

If the soil is too loose before seeding, the nal packed surface will be excessively

below the loose soil that is thrown to the sides. This increases the likelihood of

soil falling, blowing or washing back into the closed and packed furrow. The re-

sult is an altered seed depth. The solution to this is to ensure that the soil is not

too loose before seeding. It may be necessary to pack the soil before seeding.

The Seed Hawk drill will cover adjacent rows if:

• The soil is conventionally tilled leaving it loose.

• Straw and/or chaff is poorly spread, wet or in large clumps.

• Field travel speed is excessive. May affect above listed items.

4.10 Seed Hawk

Packer Tire

The packer tire bulges slightly to provide uniform packing over the seed and

fertilizer furrows. This leaves the seed ¾ in. (19mm) below the curved path left

by the packer wheel. The seed is placed in an ideal environment: moisture will

be channeled into the path of the packer tire; fertilizer is placed in the optimum

position for seed growth; and the seed knives leave a dark strip, which warms

more quickly than the surrounding residue covered soil.

Packer Tire

Seed Knife

Fertilizer Knife

Final Packed Surface

Loose Soil and Straw

Original Ground Level

Seed

Fertilizer

Item Dimension Description

X ¾ in. (19mm) Seed Depth

Y ¾ in. (19mm) Seed to Fertilizer Depth

Z 1-½ in. (38mm) Seed to Fertilizer Separation

4.10.2 Muddy Soil Conditions

4.10.3 Operating Curves & Corners

Seeding depth may be altered if mud sticks to the packer tire. If mud is only

1/4"-3/8" (6-10mm) thick, then this is not usually a concern. Assuming good

soil moisture, the reduced seed depth is still adequate. Air-inated packer tires

should be deated slightly to allow the tire to bulge slightly and shed any mud

build up. If the mud thickness is uniform, the seed depth, also, will be uniform,

but shallower than the initial depth setting.

It may be desirable to set the seed depth deeper to compensate for mud build

up.

When seeding around curves and corners the packer wheel moves out of the

furrow and rides up on the hard, undisturbed furrow shoulders. Packing force

is concentrated more so on the shoulder and the packing on the seedbed is

reduced. In addition to reduced packing action, fertilizer placement is also ad-

versely affected. Optimum performance, of course, is seeding in a straight path

as much as possible. It is also important to turn right as much as possible to

keep the fertilizer out of the seed row. When turning, the conguration of the

fertilizer sideband is less to cause seed burn when turning in a right-hand arc.

4.10.4 Low Packer Tire Pressure

For packer tires that are air inated: if the packing forces are high and the tire

pressure is low, effective packing action is reduced. The tire widens and rides

harder on the furrow shoulders. This can be corrected by increasing tire pres-

sure and/or reducing downward packing force.

A bulging packer tire will cause the seed and fertilizer to be placed lower than

the initial setting on the opener. One indication that a packer tire is low in air

pressure is when it has less mud build up on it.

Seed Knife

Seed Furrow

Packer Tire

Seed

Fertilizer Knife

Fertilizer

Fertilizer Furrow

Final Packed

Surface

Under Ination Proper Ination

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 56 57

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Seed-hawk TOOLBAR 2014 Manuel d'utilisateur Page 23

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