Abstract:
A power operated jab type paddy dibbler developed and
tested at K.C.A.E.T, Tavanur is described. A cup feed type
metering mechanism, discharged the seeds into the
distribution wheel. Rotation of this wheel caused the transfer
of seeds from the distribution wheel to the seed tubes. The to
and fro motion of the plungers inside the five seed tubes
closed and opened the port between the seed tran9fer tube and
seed tube at predetermined intervals. A cam and follower
arrangement fitted on the main shaft regulated the to and fro
motion of the plungers.
In operation, the rotation of the dibbler wheel caused
the tip of seed tubes to make holes in the soil. At the time
of penetration the plunger occupied a position farthest to the
main shaft thus keeping the tip of seed tube closed. This
prevented the entry of soil into the seed tube. After the
seed tube has reached the maximum depth the plunger is moved
up quickly transferring the seeds into the holes.
The dibbler gave seed rates of 87.1, 74.6, 68.0, and 61.1
kg/ha at the speeds 0.788, 1.152, 1.530 and 1.778 km/h
respectively in the field. It placed at an average 3-6 seeds
in a hill at a depth of 4-4.2 cm. The number of seeds
mechanically damaged was only 0.89 per cent and loss of
viability due to mechanical damage was only 3.77 per cent.
The average power required was 0.093 hp. Labour requirement
was 60.68 man-h/ha. Cost of operation of this dibbler was
Rs 86.0/h including the cost of power source. The jab type
dibbler is convenient for use by both men and women.
