The unit of culture industry, agricultural plant to plant seeds in soil, and method of detecu00c7u00e7o of espau00c7amento seed is described a unit of culture in row for use in an agricultural semeadeira which includes an opener for opening a ditch ditch in the ground, a dosing system D. Seed to seed and dose to be placed in the ditch.And a system of placement of seed to place seeds in the ditch. The system of placement of seed and the seed metering system are in communication with each other and defines at least in part a path associated with the displacement of the seed ditch. A fechador ditch covers the seed in the ditch with earth.A conditioner temperature of seed is associated with the path of displacement of the seed to vary the temperature of seed that moves through the path of displacement of the seed. A sendor sensitive to temperature is positioned to sensorear seed that was deposited in the trench between the opener and the fechador ditch ditch.A tube of optional drive maintains a sensor sensitive to temperature or arrangement of sensors. A lens is mounted on the tube. A tube of larger diameter can be positioned around the tube packaging sendor. A positive air pressure / flow of air may be introduced between the two tubes.This positive air flow forms a positive pressure and / or barreia of air flow for pushing dirt out of the lens of the sensor or the surface of the sensor.
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