Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5471913 | Biosystems Engineering | 2017 | 12 Pages |
Abstract
Precise seeding depth plays an important role in achieving reliable germination rate and even plant emergence. In no-till seeding, this aim is more challenging due to the inappropriate response of the machine dynamics to harsh soil conditions, such as compacted soil undulations and stubble. In this paper, a sensor-frame was mounted on a no-till seeder, to measure the field surface profiles during seeding operation. Its accuracy was validated by acquiring the profile of trapezoidal bumps with known dimensions resulting in a root mean squared (RMS) error of 7.3 and 8.7 mm for travelling speed of 2 km hâ1 and 10 km hâ1, respectively. Strain gauges were used to measure the soil reaction forces, on one of the seeding assemblies during seeding operation at travelling speed of 10 km hâ1. After seeding wheat (Triticum aestivum L.), the geo-referenced position of each single seed was measured using a total station, to calculate the seeding depth. The correlation between the seeding depth variation and the developed forces showed that the frequencies of 11.8 Hz and 17.8 Hz of the vertical forces, which corresponded to a wavelength of 0.21 m and 0.14 m, respectively, were responsible for the high variation in seeding depth. For the profile impact forces, these values were equal to 10.7 Hz and 20.6 Hz. The corresponding wavelengths were equal to 0.23 m and 0.12 m. The peak value of seeding depth was detected at a frequency of 8.3 Hz with 0.3 m wavelength for both vertical and impact profile forces.
Keywords
Related Topics
Physical Sciences and Engineering
Engineering
Control and Systems Engineering
Authors
Galibjon M. Sharipov, Dimitris S. Paraforos, Alim S. Pulatov, Hans W. Griepentrog,