Forces and loosening characteristics of a new winged chisel plough (original) (raw)
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This paper presents experimental study of the performance of chisel plow under conditions of central irrigated Schemes. The research was conducted in the Gezira irrigated Scheme at Experimental Field of Gezira University. Mounted 3-rows chisel plows mark RAU and 75 hp Massey Fergusson (GIAD) tractor were used in the experiment. The performance of chisel plow was evaluated by parameters, which included: losses of chiseling process (uncut area); aggregate size distribution; bulk density; soil moisture content; control of weeds and residues; degree of soil surface evenness; draft requirement; fuel consumption; and field capacity. Each of these parameter studied dependent of two parameters: working speed and depth of cut. A loss of uncut areas at critical depth was found to be 12%. The failure zone and overlap area was found to be 31.4 x 11 cm and 0.02 m 2 respectively. The later was dependent of the depth. Losses of plowed area were increased to 23% and 31% when depth was increased to...
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Soil and Tillage Research, 1998
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Tillage operation is one of the most energy – consumer operations in the process of crop production. Narrow tillage tools are vastly used in chisel plow, field cultivators, and subsoilers. Many efforts have been done to apply narrow tillage tools at suitable condition to minimize energy consumption and maximize soil disturbance efficiency. The present study was conducted to observe the effects of aspect ratio, rake angle and speed on draft and vertical forces, soil disturbed area and soil loosening efficiency. The effects of blade rake angle (at four levels 10, 15, 20 and 25 deg), travel speed (at three levels 1.5, 3 and 4.5 km/h) and aspect ratio (at three levels 1.5, 2 and 3) on draft and vertical reaction forces of the Chisel Plow were investigated. Experiments were conducted in loamy soil with 14% moisture. Results revealed that in 5 and 10 cm blade width the effects of aspect ratio, rake angle and speed on draft and vertical forces, soil disturbed area and soil loosening effici...
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Journal of Scientific Research and Reports, 2017
A rotary plough is an agricultural implement, popularly used to reduce the amount of time and labour spent in soil preparation. The objective of this study was to evaluate the performance evaluation of vertical rotary plough on fallow and cultivated land. The observed experimental are: moisture content of soil, bulk density of soil, cone index, soil mean weight diameter, wheel sleep, theoretical field capacity, effective field capacity, field efficiency, fuel consumption and weeding efficiency. Result were: soil moisture content 8.19% and 11.74%, bulk density of soil 1.99 gm/cm³ and 1.90 gm/cm³, cone index 0.236 kg/cm² and 0.144 kg/cm², soil mean weight diameters 4.17 mm and 3.86 mm, fuel consumption 6.30 l/hr and 5.76 l/hr, field capacities 0.17 ha/hr and 0.23 ha/hr and field efficiency 71.53% and 82.14% in case of fallow land and cultivated land respectively. It shows that the time required for rotary plough operation in fallow land was more than the time required for the cultivated land.
Agricultural Engineering International: The CIGR Journal, 2014
In this study, an experimental investigation regarding the influence of three independent variables including tillage depth (10, 15, 20 cm), angle of attack (60, 75, 90 degrees) and forward speed (0.5, 1, 1.35, 1.7 m/s) on draft force of a thin blade is presented. Chisel plow in this research was constructed in two furrows with a blade width of 3 cm and a maximum depth of 25 cm (the distance between two blades was 1 m). Some changes were made in the chassis of the chisel plow in order to obtain different attack angle of the blade. The experimental work was then complemented with a new theoretical model for predicting the blade force using dimensional analysis method. The final expression for estimating the pull resistance is as a function of several soil engineering properties (soil bulk density, soil adhesion and cohesion coefficients), blade parameters (blade width and blade rake angle) and operational conditions (tillage depth and forward speed). Finally constants of the model we...
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The study was conducted to investigate the effect of forces on the surface of moldboard plow (model: 1LE – 435) at three angles (65°, 75°, 90°), three depths (15cm, 20cm and 25 cm) and three moisture contents (21%, 24% and 27%) and variable on soil bin, while the forward speed of plow was kept constant (2 km/hr). In total 11 sensors were fixed on the surface of different parts of plow to measure draft forces applied on the surface of plow. Results revealed that the maximum force was observed at 90° angle, which decreased with the decreasing angles. It was also observed that varying angles have considerable effect on the width of cut. The maximum soil forces were exerted on the share of plow at all angles, while minimum force was observed on the curvature of plow. The effect of different moisture content, working depths and rake angle were significant (P<0.01). It was also observed that moisture content has inverse relation with soil forces while depth has direct relation with soi...