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Studying some mechanical indicators of grain drill at different soil moisture and seeding speed

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Document Type : Research Paper

Abstract

     The experiment was carried out during the growing season (2023-2024) at a farmer's field in Baweiza / Telkif, northwest of Mosul city, which is located within the Semi-Arid (36°27'17.8"N 43°04'51.9" E). Where the rain amount reached 279 mm. The field soil was characterised as a Silt-Loamy soil texture. A Turkish modern disk grain drill was used in the experiment (Skalak), which is manufactured specifically for conservation agriculture, for seeding wheat grains. The experiment included three factors: the first was soil moisture with two high levels of 23% and an ideal moisture level of 17%; the second was three seeding speeds (8.3, 10.3 and 12 km/h); and the third was seeds coverage tool (with and without press wheels), the experiment was established using a Randomized Complete Block Design (RCBD) under split-split plot system, where the moisture factor occupied main plots, seeding speed was assigned to sub-plots, and sub-sub-plots were used for seeds coverage tool. The Duncan multiple range test compared means at a 0.05 significance level. The following traits were studied: Slippage percentage, soil adhesion strength, actual soil disturbance volume, and grain yield. The important results are that the ideal soil moisture of 17% achieved significant improvements in all studied qualities compared to high soil moisture of 23%. The results also indicated a significant effect at a speed of 12 km/h, where the highest value of slippage, soil disturbance volume, grain yield, and the lowest soil adhesion strength were recorded. The use of press wheels achieved a significant positive difference in soil adhesion strength, while not using press wheels led to a significant improvement in the slippage percentage. The results showed that the triple interaction between moisture content, seeding speed and seed pressure wheels did not significantly differ in the studied characteristics (slippage percentage, actual soil disturbance volume, and grain yield). However, it was found that there was a significant effect in reducing the value of adhesion force at ideal humidity with a speed of 12 km / h using seeds press wheels

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Kirkuk University Journal for Agricultural Sciences (KUJAS)
Volume 16, Issue 2 - Issue Serial Number 2
June 2025
Page 11-18
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