tailieunhanh - Development of a precision seed drill for oilseed rape
At the present time, the most widely used machine for seed and oilseed planting is a seed drill with a roller-type-metering device. Due to nonuniform spacing of seeds along the rows and lack of control on planting depth, this machine aggravates the growth related problems and degrades the quality of a sensitive crop such as oilseed rape. | Turk J Agric For 32 (2008) 451-458 © TÜBİTAK Development of a Precision Seed Drill for Oilseed Rape Ebrahim AHMADI1, Hamid Reza GHASSEMZADEH2,*, Mohammad MOGHADDAM3, Kyeong Uk KIM4 1 Department of Agricultural Machinery Engineering, Faculty of Agriculture, Bu-Ali Sina University, Hamedan - IRAN 2 Department of Agricultural Machinery Engineering, Faculty of Agriculture, University of Tabriz, Tabriz 51664 - IRAN 3 Department of Agronomy and Plant Breeding, Faculty of Agriculture, University of Tabriz, Tabriz 51664 - IRAN 4 Biosystems Engineering College of Agriculture and Life Sciences, Seoul National University, 151-921 Seoul - KOREA Received: 25,07,2007 Abstract: At the present time, the most widely used machine for seed and oilseed planting is a seed drill with a roller-type-metering device. Due to nonuniform spacing of seeds along the rows and lack of control on planting depth, this machine aggravates the growth related problems and degrades the quality of a sensitive crop such as oilseed rape. To solve the above-mentioned problems, an attempt was made to develop a precision seed drill with a roller-type-metering device and a depth control system. Some of the design parameters affecting the uniformity of seed distribution were studied from the view point of roller and brush geometry. Computer software packages were used to design the machine and simulate its operational performance. In the laboratory test, it was found that the precision seed drill performed satisfactorily and its speed and vibration did not affect the performance of metering system significantly. In the field test, a uniform distribution of seed with a reasonable spacing along the row planting was achieved and seed scattering was found to be within an acceptable range. Key Words: Oilseed rape, precision seed drill, conventional drill Introduction One factor affecting the quality of the crop in mechanized crop production systems is the planting operation. The more precise the planting
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