Study of soil disturbance under vibrating subsoiler
1997
Preecha Raruen
Laboratory tests to study of Soil disturbance under Vibrating Subsoiler was conducted in a soil bin with Sandy Clay Loam at moisture contents of 13.95 percent (db), 21.97 percent (db), 22.09 percent (db) and 14.19 percent (db) and dry bulk densities of 1.68 g/cubic cm, 1.47 g/cubic cm, 1.49 g/cubic cm and 1.62 g/cubic cm. Tests were conducted at frequencies of 4.16 Hz, 6.90 Hz, 9.17 Hz and 13.74 Hz and amplitudes of 18 mm and 35 mm and forward speed 0.5 m/s. The density of big clods size soil were not changed. The density of 2 inches clods size soil were reduced with increasing frequencies. The power requirement to vibrate shank of subsoiler was found to be affected by frequencies amplitudes and moisture contents. The power required were increased with increasing frequencies, reducing amplitude and reducing moisture content. Area of the disturbed soil by subsoiler was not affected by frequencies, amplitudes and moisture contents. The working condition for optimum performance of subsoiler was compromise between torque and power requirement, density of clods size and area of disturbed soil should be frequencies of 6.90 Hz to 9.17 Hz and amplitude of 35 mm.
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