الفهرس 
Introduction and aim of the workOnly 14 pages are availabe for public view
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Abstract
The aim of the present study is to develop a rationalized power consumes, and operation cost sugar beet harvester machine to be suitable for the Egyptian agricultural conditions. The developing machinery components are namely: - Ridge rarefaction unit, pulling unit, topping unit, and transmission system. The present study cover the following:- (1)Determination the physical and mechanical properties of both plant portions and the soil surrounded. (2)Deriving the necessary theoretical relationships that focus on the design prerequisites and the main dimensions required for manufacturing a proper pulling sugar beet harvester machine. (3)Manufacturing the proposed harvester by relating its design dimensions to the theoretical considerations. (4)Evaluating the mechanical, the ridge refraction, the beet uprooting, and the topping performances of the developed harvester as affected by different design and operating parameters. (6)Estimation the net economical benefit, if the developed harvester, would be applied and replaced instead of the traditional harvesting techniques. The mechanical performance was evaluation in terms of required traction effort, and percent of slip. Under operating parameters (1)-Four travel speed levels namely:- 3, 3.5, 4 and 4.5 km/h. (2)-Four space levels between the bottom edges of rarefaction shares namely: - 15, 20, 25, and 30cm. and (3)- Two fields differed in soil type namely:- Loaming clay soil and silt clay soil. The ridge refraction performance was evaluation in terms of root damage, and manual required pulling force. Using the mechanical operating parameters. The beet uprooting process was evaluation in terms of - Efficiency of uprooting process, fuel consumption and uprooting power requirement. Under operating parameters (1) Four speed ratio (SR) between belt speed to tractor speed namely:-1, 1.25, 1.5, and 1.75. (2)Three levels of belt inclination angle to the horizontal namely:-20, 25, and 300. (3) Two fields differed in soil type. The leaf topping operation was evaluation in terms of topping quality, Efficiency of leave topping %, and Process fuel consumption. As affected by the following variables (1) two different disc knife types namely:- smooth and sharp tooth edge. (2) Three clearance levels between the discs namely:-1, 1.5, and 2cm. (3) Three-disc knife speed levels namely: - 1.25, 1.6, and 1.9 m/s. The results can be summarize as following (1) The required traction force (TF) for rarefaction sugar beet ridge actualize its lowest value (5.31 KN) at 3 km/h with Silt clay loam soil. While it attains it’s maximum Value (9.75 KN) at 4.5 km/h. with loaming clay soil. (2)Increasing space between the bottom edges of rarefaction shear from 15 to 30 cm decreasing the percent of root damage by 10.12 % . Also increasing travel speed from 3 to 4.5 km/h increasing the percent of root damage by 3.2 %. (3)The maximum obtained uprooting efficiency value of the developed harvester was 93.97 % (4) Increasing speed ratio from 1 to 1.75 increased uprooting efficiency by 4.22 %. However, Increasing inclination angle one and half time increasing the uprooting efficiency by 4 % (5) The maximum topping efficiency was 93.4% using sharp tooth edge disc. (6)Using the developed harvester decreased unit cost by 69 %, Increased uprooting percent by 19 % and decreased root damage percent by 13 % comparing by the digger techniques