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Articles by Rasim Okursoy
Total Records ( 3 ) for Rasim Okursoy
  Esref Isik , Yucel Tekin and Rasim Okursoy
  This study was carried out in order to reveal the agricultural mechanization potential of Turkey, who has been trying to integrate with the EU to establish the current problems in agricultural mechanization and to find permanent solutions to those problems. In this study, the recent agricultural mechanization data and the values regarding the mechanization index are compared to the ones of the member states and candidate states of the European Union. A significant structural variation has been observed in Turkey’s agriculture however the current agriculture and mechanization potential is much better than many candidate states to be integrated with the EU Generally, the data regarding the western regions of Turkey are higher than the ones belonging to the member states of the EU and the candidate states if you consider the situation in the mechanization process.
  Yucel Tekin and Rasim Okursoy
  Soil compaction is an important physical limiting factor for root emergence and the growth of plants. Therefore it is essential to control soil compaction, which is normally caused by heavy traffic in fields during the growing season. Soil compaction in fields is usually measured by using standard soil cone penetrometers, which can be of several different types according to their design. Most of the time, especially in heavy soil conditions, measuring soil compaction with a standard hand penetrometer produces measurement errors if the cone of the penetrometer cannot be pushed into the soil at a standard rate. Obtaining data with hand penetrometers is also difficult and takes a long time and effort. For this reason, a three-point hitch-mounted and hydraulic-driven soil cone penetrometer has been designed in order to reduce time and effort and to reduce possible measurement errors in the sampling of soil compaction data for research purposes. The hydraulic penetrometer is mounted on the three-point hitch and a hydraulic piston pushes the standard penetrometer cone into the soil at a constant speed. Forces acting on the cone base are recorded with a computer-based 16-bit data acquisition system composed of a load cell, a portable computer, signal amplification and necessary control software for the sampling. As a conclusion, the designed and constructed three-point hitch-mounted hydraulic-driven standard soil cone penetrometer provides with quick and very accurate measurements about soil compaction in clay soil in heavy conditions.
  Yucel Tekin , Esref Isik , Halil Unal and Rasim Okursoy
  The physical properties of Turkish Göynük Bombay bean grains were determined as a function of moisture content in the range of 10.25-25.6% dry basis (d.b.). The average length, width and thickness were 22.60, 13.57 and 10.25 mm, at a moisture content of 10.25% d.b., respectively. In the above moisture range, the arithmetic and geometric mean diameters increased from 15.477 to 16.283 mm and from 14.617 to 14.825 mm, respectively, while the sphericity decreased from 0.734 to 0.599. In the moisture range from 10.25 to 25.6% d.b., Studies on rewetted Turkish Göynük Bombay bean grains showed that the thousand grain mass increased from 1700 to 2170 g, the projected area from 185.80 to 225.44 mm2, the true density from 1301.60 to 1452.80 kg m-3,the porosity from 46.287 to 63.047% and the terminal velocity from 6.20 to 6.98 m sec-1.The bulk density decreased from 664.95 to 536.19 kg m-3 with an increase in the moisture content range of 10.25-25.6% d.b. The static coefficient of friction of Turkish Gunk Bombay bean grains increased the linearly against surfaces of six structural materials, namely, rubber (0.41-0.60), aluminum (0.33-0.48), stainless steel (0.29-0.40), galvanized iron (0.32-0.43), glass (0.28-0.40) and mdf (medium density fiberboard) (0.24-0.36) as the moisture content increased from 10.25 to 25.6% d.b. The shelling resistance of Turkish Göynük Bombay beans grain decreased as the moisture content increased from 100.76 to 59.01 N.
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