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| Experiment of subsioling draught under different soil physical properties |
| 1.College of Engineering, China Agricultural University, Beijing 100083, China； 2. College of Mechanical and Electrical Engineering, Shihezi University, Shihezi, Xinjiang 832003, China |
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Abstract In order to explore the subsioling draught and soil properties under different soil conditions, the comparison of field subsioling experiments was carried out between yellow clay soil in Xinzhou, Shanxi province and light loam in Gu′an, Hebei province. Soil bulk density, compactness and soil profiles were measured and compared before and after deep ripping operations. The experimental results show that the soil bulk density and compactness of light loam are less than those of yellow clay soil before deep ripping operation. The bulk densities of light loam and yellow clay are changed from 1.59 g·cm-3 to 1.30 g·cm-3 and from 1.62 g·cm-3 to 1.27 g·cm-3 after ripping operation， respectively. After deep loosening, the average decrease ratios of compactness are 9% and 11% for Gu′an soil and Xinzhou soil， respectively. In the cases of 30 cm and 40 cm subsoiling, the traction resistance decrease percents of light loam are 61% and 47% less than those of yellow clay soil， respectively.
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Received: 31 December 2012
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2014, Vol. 35 
