Sėjamosios prototipo projektavimas, kūrimas ir įvertinimas tarpinių pasėlių ir kelių rūšių sėjos sistemų kintamosiomis sėjos normomis
Item type:Publication, research article[2026][S1][T009][13]; ; Flow measurement and instrumentation, 2026, vol. 108, p. 1-13Uniform seed distribution is essential for optimizing crop yield and enhancing seeding quality in modern agricultural practices. The helicoidal seed tube was developed to regulate seed flow within seed drills just before seeds are dispensed into the furrow, addressing challenges in consistent seed placement. This study presents a Discrete Element Method (DEM)-based approach for measuring the motion characteristics of wheat seeds within such a helicoidal tube, with the goal of enhancing measurement precision in evaluating seed velocity, spacing, and flow consistency. The DEM model was calibrated against experimental data, achieving strong agreement, including a particle flow rate of 1.34 g s−1 and a total discharge of 17.37 g over 20 s. Sensitivity analyses were performed on pitch size, tube inclination, and input flow rate, revealing their influence on seed velocity (0.40–1.30 m s−1), spacing, and the occurrence of flow interruptions. Larger pitch sizes (36 mm and 40 mm) supported smoother flow without blockage even at higher rates. This study offers a validated methodology for quantifying dynamic particle behavior in confined geometries using simulation and bench-scale testing. It contributes to measurement science by providing a structured framework to analyze, validate, and optimize seed flow systems, which can be extended to broader granular flow measurement applications.
10 Item type:Publication, [Tarpinių pasėlių sėjos sistemos tvariam žemės ūkiui]research article[2025][S4][T004][5]; ; ; Žmogaus ir gamtos sauga 2025 : mokslo straipsnių rinkinys = Human and nature safety 2025 : selected papers, p. 46-50Successful adaptation to climate change in agriculture requires the use of techniques that ensure the long-term sustainable use of resources and eco-efficiency. Intercropping is an example of a sustainable agricultural system that seeks to achieve ecological balance, better use of resources, and increase the quantity and quality of yields. Innovative precision farming seed machines are used that can adjust seeding rates, reducing the amount of driving in the fields, thus saving working time and fuel consumption. Intercropping faces to several problems: applying different seed sizes at the same time, maintaining different seed rates, etc.
The aim of this research work would be to investigate seeding systems for intercropping using engineering modelling. The design of the metering systems completed, and preliminary simulation trials have demonstrated that seed metering systems using mechanical disc plates achieve more than 80% success in singulating seeds within intercropping systems; however, further research is necessary to enhance these results. The results of the analysis showed that innovative designs of seeding systems for intercrops could have a positive impact on sustainable agricultural development. This would lead to maximum machine productivity, higher quality and quantity of agricultural products and more sustainable farming.
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