Great Plains P18253C Operator Manual - Manual (Page 23)

23 Simba SL
Operating Instructions
The Simba Great Plains SL is an
amalgamation of time proven, successful
Simba Great Plains designed components
brought together to form this important
development. The SL provides a one pass
mix with a fissured layer at disc depth for
through drainage and root access to lower
horizons. This enables rapid drainage
and access after rain, creating a greater
effective capacity for moisture compared to
ploughing for the same effective total depth
of cultivation.
In principle, the machine is an offset disc
with Spring Reset tines, designed for low
draft, high speed operations. The addition
of a rear mounted roll enables effective
cultivation in one pass. The leading set
of disc blades cultivate the top horizon,
minimising clod formation and reducing
tine loadings and blockage. This starts the
‘top down’ cultivation process, retaining
weathered tilth in the surface level for stale
seedbed purposes. The front row of discs
is then followed by tines. The tines work to
shatter at depth retaining the surface intact
to leave astale seedbed. This eliminates
the problem of ‘wet years’ in non-plough
based terms. The key to the SL’s success
are the tines which maintain shatter across
the full width of cultivation. The rear roll then
consolidates the surface, cracks any clods
and firms the soil profile after the rear gang
completes mixing to depth. The corrugated
top and shattered lower horizons are left
fully weatherproof to any conditions between
cultivation and drilling whilst retaining
moisture below the surface for rapid straw
breakdown and optimum establishment of
the next crop.
4. Adjustment / Operation