TATU PST DUO FLEX, Руководство оператора

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Marchesan Implementos e Máquinas Agrícolas “TATU” S.A. PST DUO FLEX / PST DUO FLEX SUPREMA
Adjustments and operations
Planning the plantation - Slippage index
Consider that the amount of plants in the harvest is always smaller than the number
of seeds distributed in the planting operation, due to the following factors: germination rate,
physical purity, vigor (provided in the seed pack), plagues and diseases that may take place
during the cultivation cycle. The strategy to minimize the loss of plants on the cultivation is
to “compensate” the deposition of seeds on the furrow, considering the following methods.
During operation, the tires may slip frequently, due to the local conditions regarding the
soil, weather, adjustment and set-up of the mechanized set (tractor-equipment) and others.
Considering this, the main slippage factors are:
• Tractor fuel consumption increase;
• Efficiency loss;
• Excessive and premature wear on the tires;
• Premature wear on the mechanical components of the equipment;
• If the metering mechanism is activated by the wheel supports, there may be a bad
seed distribution per meter, leading to skips or doubles. A bad fertilizer distribution may also
have negative results, leading to excess or lack of deposition.
To avoid these problems, it is recommended to calculate the slippage index to
compensate the deposition of seeds per linear meter (as described on the following page),
as well as to calibrate and to add liquid ballast to the tires.
This index is obtained by comparing the number of spins the tire will perform, being the
planter with empty hoppers related to the equipment filled up. Being the planter empty and
normally hitched to the tractor, set a starting point on the ground and on the tire. Move the
planter until the tire complete 10 (ten) spins. Measure and write down the traveled distance.
Fill up the hopper, repeat the previous procedure and write down the traveled distance.
After that, insert the data on the formula below and check the slippage index of your
equipment. This calculation is part of the dimension of the desired number of plants on the
field, located on the next page.