<abstract xmlns="http://www.w3.org/1999/xhtml">

For harvesting crops, one-phase and two-phase methods are most often used. When implementing the second one, mounted and trailed units are used. The latter is becoming less and less used due to the problems with movement stability in the horizontal plane because of the asymmetric layout. A stubble background, which is susceptible to solar and wind influences, is formed as a consequence of application of the mounted harvesting unit, As a result, the field’s soil in the inter-swath space intensively loses moisture. A harvesting unit based on a tractor with rear steerable wheels has been designed to eliminate this shortcoming. A header is mounted on its front hitch linkage system, and a disc harrow is mounted on the rear one. During the working movement, such a harvesting unit mows the crop into swaths, chops the stubble in the inter-swath space, and simultaneously incorporates it into the soil. This article presents the operation results of such a unit for harvesting winter wheat, oats, and sudan grass. Research has established that oscillations in the deviations of the mowed crops’ swaths from a straight line are of low frequency. The variances spectra of this process, as follows from the Analysis of normalized spectral densities, are concentrated in the frequency range of 0-0.5 m−1. The mean value velocities of the harvesting unit are 2.13-2.61 m·s−1, which is 0.17-0.21 Hz. The variances of oscillations in the header operating width, the cut crop’s swath width, and the disc harrow’s width are concentrated in approximately the same low-frequency range, the maximum value of which is small and does not exceed 0.9 m−1 or 0.37 Hz. The oscillation processes of the mowed crops’ stubble height have a higher frequency. The cutoff frequency of their normalized spectral densities is at the level of 3.0 m−1. In terms of time, considering the harvesting unit movement velocity of 2.13-2.61 m·s−1, this is 1.02-1.25 Hz. At the same time, oscillations in the stubble height of mowed crops are characterized by small variances, the maximum value of which does not exceed 11 cm2.
</abstract>

For harvesting crops, one-phase and two-phase methods are most often used. When implementing the second one, mounted and trailed units are used. The latter is becoming less and less used due to the problems with movement stability in the horizontal plane because of the asymmetric layout. A stubble background, which is susceptible to solar and wind influences, is formed as a consequence of application of the mounted harvesting unit, As a result, the field’s soil in the inter-swath space intensively loses moisture. A harvesting unit based on a tractor with rear steerable wheels has been designed to eliminate this shortcoming. A header is mounted on its front hitch linkage system, and a disc harrow is mounted on the rear one. During the working movement, such a harvesting unit mows the crop into swaths, chops the stubble in the inter-swath space, and simultaneously incorporates it into the soil. This article presents the operation results of such a unit for harvesting winter wheat, oats, and sudan grass. Research has established that oscillations in the deviations of the mowed crops’ swaths from a straight line are of low frequency. The variances spectra of this process, as follows from the Analysis of normalized spectral densities, are concentrated in the frequency range of 0-0.5 m−1. The mean value velocities of the harvesting unit are 2.13-2.61 m·s−1, which is 0.17-0.21 Hz. The variances of oscillations in the header operating width, the cut crop’s swath width, and the disc harrow’s width are concentrated in approximately the same low-frequency range, the maximum value of which is small and does not exceed 0.9 m−1 or 0.37 Hz. The oscillation processes of the mowed crops’ stubble height have a higher frequency. The cutoff frequency of their normalized spectral densities is at the level of 3.0 m−1. In terms of time, considering the harvesting unit movement velocity of 2.13-2.61 m·s−1, this is 1.02-1.25 Hz. At the same time, oscillations in the stubble height of mowed crops are characterized by small variances, the maximum value of which does not exceed 11 cm2.

Experimental Studies on the Operation of Agricultural Crops Mowing Unit with Simultaneous Chopping and Incorporation of Stubble Into the Soil

Dmytro Motornyi Tavria State Agrotechnological University

Higher Educational Institution “Podillia State University”

Innovative Program of Strategic Development of the University, European Social Fund, University of Agriculture in Krakow

Ukrainian University in Europe – Foundation

Wroclaw University of Environmental and Life Sciences

Agricultural Engineering

This work is licensed under the Creative Commons Attribution 4.0 International License.

For harvesting crops, one-phase and two-phase methods are most often used. When implementing the second one, mounted and trailed units are used. The latter is...

Experimental Studies on the Operation of Agricultural Crops Mowing Unit with Simultaneous Chopping and Incorporation of Stubble Into the Soil

Publicado en línea: 30 nov 2023

Páginas: 301 - 313

Recibido: 01 sept 2023

Aceptado: 01 sept 2023

DOI: https://doi.org/10.2478/agriceng-2023-0022

Palabras clave
header, disc harrow, swath, stubble height

© 2023 Volodymyr Nadykto et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Experimental Studies on the Operation of Agricultural Crops Mowing Unit with Simultaneous Chopping and Incorporation of Stubble Into the Soil

Publicado en línea: 30 nov 2023

Páginas: 301 - 313

Recibido: 01 sept 2023

Aceptado: 01 sept 2023

DOI: https://doi.org/10.2478/agriceng-2023-0022

Palabras claveheader, disc harrow, swath, stubble height

© 2023 Volodymyr Nadykto et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Palabras clave
header, disc harrow, swath, stubble height