1 INTRODUCTION
The LELYTERRA is a Power Harrow for crumbling and
levelling compacted or ploughed land so that an effective
seed bed is achieved.
The rotating movement and special shape of the tines (fig. 1)
ensure perfect crumbling.
Because of the trailing tine position, the top soil layer is not
mixed with the lower layers which are usually moist and of a
lesser quality.
The degree of crumbling depends upon forward speed and
rotor speed. The rotor speed can be changed by means of
change gears (fig. 2).
Working depth is adjusted quickly and easily by means of a
depth control roller. This roller ensures a consistent working
depth as well as effective surface levelling. According to the
circumstances an open centre roller, a star packer roller or a
packer roller can be used.
Assembly of the depth control roller to the LELYTERRA
power harrow is according to the Floating System (fig. 3)
allowing the machine itself to ride out of the soil when
striking on stones or tree roots whilst the depth control roller
keeps following ground contours.
This is an important feature especially if the LELYTERRA
power harrow is fitted with a (relatively heavy) packer roller.
The LELYTERRA power harrow has a very compact con-
struction and can be linked very close behind the tractor so
that a drill or planting machine can be fitted behind the
LELYTERRA power harrow allowing the combination of
various operations in one single working pass.
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