Performance Evaluation of Straight and Parabolic Seed Tubes on Longitudinal Seed Distribution under Varying Sowing Speeds and Lateral Inclination Angles
DOI:
https://doi.org/10.66069/ojspub.26820904Keywords:
Seed Tube, Straight Profile, Parabolic Profile, Sowing Speed, Lateral Inclination Angle, Longitudinal Seed Distribution, Seed Meter, Single Seed Spacing, Agricultural ProductivityAbstract
The uniform distribution of seeds during sowing is essential for maximizing agricultural productivity. Seed tubes play a crucial role in this process, as they directly influence the longitudinal distribution of seeds. This study evaluated the performance of two seed tubes, one with a straight profile and the other with a parabolic profile, under different sowing speeds and lateral inclination angles of the seed meter. A mechanical horizontal disc plate meter was employed. Three experimental factors were examined: seed tube profile (straight and parabolic), lateral inclination angle of the metering unit at four levels (11°, 1°, 0°, and −11°), and sowing speed at three levels (5, 7, and 9 km·h⁻¹). A significant triple interaction was identified among tube profile, travel speed, and lateral inclination angle of the metering unit with respect to single, double, and missing seed spacings. The parabolic profile tube yielded a higher percentage of single spacings and lower percentages of double and missing spacings than the straight tube, with the best results observed at 5 km·h⁻¹ and a leveled inclination angle (0°). These findings provide a useful reference for optimizing seed tube design and sowing parameters.
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