Abstract
The purpose of this study was to examine the impact of various single-disc type furrow openers used in no-till seeders on furrow aspects and forces acting on the discs at various soil moisture contents, soil compaction levels, and seeding depths in soil bin. Factors included plain, notched, wavy, concave, and fluted types of disc coulters, two soil moisture levels (12-18%), two soil compaction levels (2-3 MPa), and two seeding depths (50-75 mm). According to the results, the plain, notched, and fluted type discs had the lowest vertical, draft, and side force, while the wavy type disc had the maximum vertical force, draft force, and side force and the concave type disc had the highest side force. The vertical, draft, and side force requirements of all furrow openers were found to be lower in loose soils with low moisture content and greater in compacted soils with high moisture content. Fluted, concave, and wavy-type discs produced the best results in terms of the specific vertical, specific draft, and specific side forces, respectively. While the highest furrow cross-sectional area was obtained in the wavy disc, this furrow opener was followed by concave, notched, fluted, and plain-type furrow openers, respectively.
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