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preparing the fieldpreparing the field forforWET DIRECTWET
DIRECT--SEEDINGSEEDING
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a.Plow the field after the first heavy rain.
Harrow the field thoroughly (one lengthwiseand two crosswise)
when water accumulatesin the field. Close all openings to
preventdraining of water. Leave the field submergedfor several days
(about 7-10 days) to allow
decomposition of plant debris.
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b. Plow and then harrow thoroughly (one
lengthwise and two crosswise). Leave for
another 7-10 days and harrow and leveling,
Keep the field flooded.
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c. Do the final leveling as uniform as possible toeliminate
uneven soil surfaces. Drain excess waterand maintain a thin film of
water on the soil surface
to prevent drying of the soil.
NOTE: Allowing weeds to germinate and emerge inbetween tillage
operation will help reduce the weedseed bank in the soil, which may
ultimately reducethe incidence of weeds in the crop. Well
leveledfield will make better control of water level tomanage
weeds.
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a.Seeding rate used may range from 60 300
kg/ha. Higher seeding rate is used to increase
competitive ability of rice against weeds,
however, it may not necessarily increase yield.Some farmers use
high seeding rate to
compensate for damages due to snails, birds,
rats and uncontrolled flooding.
Seeding
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b.Sowing of wet direct-seeded rice is generally
done by broadcasting pre-germinated seeds
unto puddled soil. This method restricts the
use of manual weeding and mechanical
weeding extremely difficult or impractical.
Seeding
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Row-seeding is more flexible when choosing
weed control method.R
ow-seeding can bedone using a drum-seeder. In addition to
sowing in rows, drum seeder also reduces the
amount of seeds used without reduction in yield
compared to broadcast seeding. See Figure 1on how to use a drum
seeder.
