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4. ESSENTIAL SOWING CONCEPTS
4.1 TERRAIN
The better the soil condition, the better the sowing quality.
Work is more difficult on big clods or uneven furrows.
Although machines resist harsh conditions, if the seedbed
does not satisfy apropriate conditions then the sowing
quality will suffer.
4.2 THE SEED
It is essential to use high-quality, clean and uniform seeds.
4.3 SEED PLANTING DEPTH
The seed planting depth has consequences for tillering,
as well as for the plant’s strength and its ability to resist
frostbite or drought. The parent shoot grows from 1 to 2 cm
under the ground, whatever the depth of the seed.
Planting deeper does not necessarily mean getting deeper
roots. Only a few roots grow from the lower part of the seed.
Most of them grow from a parent shoot close to ground level.
Normal Planting Depth: from 2 to 4 cm
Fig. 4.1
Fig. 4.1
SEED
SEED
Tillering
Tillering
node
node
• Thick stem, short rhizome
and resistant to frostbite.
• Multiple tillering providing
from 3 to 6 shoots and a lot
of blades, from 6 to 10.
• Deep and thick roots,
approximately 5 cm in width
and 10-12 cm in depth.
• With less grains per sowing
square metre, more ears
are obtained.
Deeper Planting: from 5 to 6 cm
Fig. 4.2
Fig. 4.2
SEED
SEED
Rhizome
Rhizome
Tillering
Tillering
node
node
• Fine stem, rhizome
exposed to frostbite.
• Late and weak tillering, 1
or zero shoots and only
a few blades, 3-4 aprox.
• Medium quality roots
of approximately 3 cm
in width and 5 cm in depth.
• More grains per sowing
square metre are required
to obtain the same
number of ears as in the
previous case.
Very deep planting: from 8 to 10 cm
Fig. 4.3
Fig. 4.3
Rhizome
Seed
Tillering
node
• Very fine stem. No tillering
and only one blade.
• Seed runs out of supplies
by growing a long rhizome
which frostbite can easily
cut.
• The plant takes weak
roots, approximately 1 cm
in width and 3 cm in depth.
• Twice the number of grains
per sowing metre are
required to obtain the same
number of ears as in the
first case.
IN VERY COLD PLACES, REPEATED FROSTBITE
CAN HAVE A HONEYCOMB EFFECT ON THE
GROUND’S MOST SUPERFICIAL LAYER. IN THIS
CASE THE PLANT’S VERY FIRST ROOTS CAN
LOOSEN AND THE PLANT WILL DIE. SLIGHTLY
DEEPER PLANTING IS RECOMMENDED
AND IF POSSIBLE, THE USE OF ROLLERS
TO COMPACT THE EARTH TO BETTER PROTECT
THE SEEDS.
WHEN STARTING THE MACHINE, FURROWS
WILL NOT CONTAIN ANY SEEDS FOR A METRE.
WHEN STOPPING THE MACHINE, SEEDS
WHICH WERE PREVIOUSLY INSIDE THE SEED
HOSES, SLIDE FROM THE MACHINE AND END
UP PILED ON THE GROUND. TAKE THIS INTO
ACCOUNT WHEN STOPPING AND STARTING
THE MACHINE IN ORDER TO ACHIEVE MORE
ACCURACY.
ALWAYS WORK AT A UNIFORM SPEED
AS SUDDEN ACCELERATING AND SLOWING
DOWN WILL CAUSE AN IRREGULAR SEEDS
DISTRIBUTION.
THE RECOMMENDED PLANTING DEPTH
VARIES DEPENDING ON THE TYPE OF CROP,
SO WE RECOMMEND THAT THE FARMER
GETS PROFESSIONAL ADVICE FROM EXPERTS
OR SPECIALISTS IN THIS AREA.
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