The aim of the present thesis is to establish the effect of the planting speed (7, 9 and 11 km/h) of a pneumatic vacuum planter on the distance between maize plants (Zea mays L.) in a planting row and, consequently, on the green fodder yield and the grain yield. The experiment was conducted on medium-textured soil at the Berus family farm in Globodol. The ground was undulating and inclined in the driving direction. The trial base consisted of random blocks with 4 various repetitions within each of them. The desired planting density was 80,800 seeds/ha, the expected distance between plants in a row was 16.5 cm. At the planting speed of 7 km/h, the average distance between plants came closest to the expected distance. At this planting speed, the percentage of doubled and empty spaces between plants in a row was the lowest, while the percentage of plants within the area of 0.5× - 1.5× expected distance was the highest. At the planting speed of 9 km/h, the percentage of doubled and empty spaces was the highest, while the percentage of plants within the desired area was the lowest. Despite lower planting accuracy at the higher speeds, i.e. at 9 and 11 km/h, there were no statistical differences compared to 7 km/h in the green fodder yield, the dry matter yield and the grain yield with a 14 % humidity.
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