Plantability and Influence of the Application of Graphite Associated With the Chemical Treatment of Soybean Seeds

Abstract

Brazil stands out among the world's largest soy producers. The uniformity in the deposition of seeds and the correct distribution of plants are important factors for the crop to express its maximum productive potential. The present study aimed to evaluate the influence of the lubricant agent “graphite”, applied during and after the chemical treatment of soybean seeds in function of its longitudinal distribution at different operating speeds. For this purpose, a seeder with mechanical type feeder was used, at three working speeds: 4, 6 and 8 km h-1 and conducted in a strip design, organized in a 2x3 factorial scheme, with two different modes of application of graphite and 3 operating speeds. The results presented showed that the addition of graphite concomitantly with the seed treatment, increases the unevenness of sowing, the same occurs in relation to the increase in the speed of operation. Graphite loses lubricating action when added to the seed treatment, increasing the number of failures.

Semeadura de soja com disco dosador agrupado pneumático sob diferentes velocidades operacionais

“…It was observed that the increase in the operational speed of sowing up to the speed of 6 km h -1 did not impact the fault spacing index in the equidistant distribution, a result that diverges from the statement made by Pereira et al (2021) that the increase in speed, from 4 to 6 and 8 km h -1 , promoted a higher index of faulty spacing, potentially caused by the greater turbulence suffered by the seeds inside the conductor tube.…”

Can Sowing Speed Affect Corn Yield?

“…The fluidity of the seeds in the feeder is affected by the operating speed. Chemical seed treatment can also interfere with sowing quality and affect seed slip in the feeder (Pereira et al 2021b).…”

Effect of using deflector in the distributor head of a pneumatic seed drill on the oat seed sowing unevenness

“…This indicator can be also determined as a ratio of square deviation of the seed average weight falling on a measurement distance in individual rows to an average weight for the whole seed drill. In turn, an indicator of lateral unevenness of seed sowing is defined as a ratio of square average deviation in a row to average deviation in a row 38 . The indicator of lateral seed sowing unevenness is commonly defined for point seed drills 38 .…”

“…In turn, an indicator of lateral unevenness of seed sowing is defined as a ratio of square average deviation in a row to average deviation in a row 38 . The indicator of lateral seed sowing unevenness is commonly defined for point seed drills 38 .…”