Document Type : Articles

Authors

• Hussein Jebur ¹
• Kasem AL-Halfi ²
• Majed Himoud ³
• Suhad Jassim ⁴

¹ Department of Agricultural Machines and Equipment, College of Agricultural engineering sciences, University of Baghdad, Iraq.

² Department of Agricultural Machines and Equipment, College of Agricultural engineering sciences, University of Baghdad, Iraq

³ Department of Agricultural Machines and Equipment, College of Agriculture, University of Basrah, Iraq

⁴ Iraq Natural History Research Center and Museum, University of Baghdad, Iraq

Abstract

The field experiment was conducted in one of AL-Kahlaa station' fields - Agricultural Directorate of Maysan Province within soil classified as silty clay loam. Three tillage' depths of (12, 17, and 22 cm) with three harrowing forward' speeds of (2.54, 3.61, and 4.32 km.hr^-1) of combined equipment (which performs three agricultural operations simultaneously, namely plowing, harrowing, and leveling) were studied during this experiment. The trial findings showed an increase of slippage percent, fuel consumption, disturbed soil volume, flower disc diameter, and oilseed yield which were 7.702%, 22.411 L. ha^-1, 596.66 m³. hr^-1, 12.555 cm, and 3.693 ton.ha^-1, respectively, when the tillage depth was increased from 12 to 17 and then to 22 cm. Whilst, the lowest average of slippage percent, fuel consumption, disturbed soil volume, flower disc diameter, and seed yield were at the lowest tillage depth' level of 12 cm which were 6.750%, 20.036 L.ha^-1, 527.44 m³.h^-1, 11.586 cm, and 3.326 ton.ha^-1, respectively. Moreover, the lowest slippage percentage (4.778%), and largest diameter of flower disc (13.877 cm) and seed yield (4.295 ton.ha^-1) were occurred at the slow forward speed of 2.54 km.hr^-1 while the lowest fuel consumption (16.506 L.ha^-1) and highest disturbed soil volume (734.55 m³.hr^-1) were achieved through the high forward speed of 4.32 km.hr^-1

Keywords

• fuel consumption
• tillage depth and flower disc diameter