Management of cover vegetation and speed of operation on conditions of sowing and corn yield

The objective of this study was to evaluate quality parameters of sowing and the development and yield of maize sown in no tillage system under different vegetation managements and operating speeds of the seeder in the southwest region of the State of Paraná. A split-plot design was used, where the plots were the vegetation management of the oat (oat latticed, rolled, chopped and desiccated) and split plot the operation speeds (4.5 and 7.0 km h), in a randomized block design with four replications. The spacing between plants, uniformity distribution of seed, sowing depth, rate of emergence, plant stand, soil area mobilized and yield of the crop were evaluated. The tabulated data were analysed by F test at 0.05 level of probability and in case of significance, the means were compared by Tukey test at 0.05 probability level. It was concluded that the best seed distribution was observed at lower speed and the mean productivity of the crop was not affected by treatments. The management of vegetation was not effective in improving conditions for sowing.