Optimization of Chisel Tine Operation Used in Combined Tillage Machine

Document Type : Research Paper


Biosystems Engineering Department, Agriculture college, Shiraz University


Performance optimization of chisel tine was proposed by using a chisel plow with adjustable rake angle. Effective treatments consisted of soil moisture at 0.5, 0.7 and 0.9 of plastic limit (PL), three rake angle of 30, 40 and 50 degree and speeds of to 3, 5 and 7 km h-1. The measured parameters included draft, soil disturbance area, soil upheaving area, clod mean weight diameter (MWD), specific draft and soil cone index (CI). The statistical design used in this study was split block factorial. To performance optimization of chisel plow in terms of six measured factors, three regression equations based on multiple regression for three factors: soil moisture, tine rake angle and travel speed for six measured qualities obtained. Regression analysis showed that the best moisture for tillage is 0.71 (PL), the best rake angle is 34 degree and the best speed is 5.5 km h-1.


Main Subjects

Arvidsson, J., Keller, T., & Gustafsson, K.. (2004). Specific draught for mouldboard plough, chisel plough and disc harrow at different water contents. Soil and Tillage Research, 79(2), 221-231.
Godwin, R. (2007). A review of the effect of implement geometry on soil failure and implement forces. Soil and Tillage Research, 97(2), 331-340
Grant, C., & Lafond, G. (1993). The effects of tillage systems and crop sequences on soil bulk density and penetration resistance on a clay soil in southern Saskatchewan. Canadian Journal of Soil Science, 73(2), 223-232.
Keller, T., Arvidsson, J., & Dexter, A.R. (2007). Soil structures produced by tillage as affected by soil water content and the physical quality of soil. Soil and Tillage Research, 92(1), 45-52.
McKyes, E., & Maswaure, J. (1997). Effect of design parameters of flat tillage tools on loosening of a clay soil. Soil and Tillage Research, 43(3), 195-204.
McKyes, E., & Ali, O. S. (1977). The cutting of soil by narrow blades. Journal of Terramechanics, 14(2), 43- 58.
Raoufat, M., &  Mashhadi, H. (1999). Determine the optimal distance between the para plow blades to achieve desired tillage. Iranian Journal of Agriculture Science, 2(30), 319-330. (In Farsi with English abstract).
Regional Network for Agricultural Machinery. (1983). RNAM test codes and procedures of farm machinery. Technical Series No. 12 (p. 129). Bangkok: Thailand.
Salar, M., Esehaghbeygi, A., & Hemmat, A. (2013). Soil loosening characteristics of a dual bent blade subsurface tillage implement. Soil and Tillage Research, 134, 17-24.
Stafford, J. V. (1979). The performance of a rigid tine in relation to soil properties and speed. Journal of Agricultural Engineering Research, 24(1), 41-56.
Stafford, J. V. (1981). An application of critical state soil mechanics: The performance of rigid tines. Journal of Agricultural Engineering Research, 26(5), 387-401.
Volume 47, Issue 4 - Serial Number 4
January 2017
Pages 658-651
  • Receive Date: 12 June 2016
  • Revise Date: 26 September 2016
  • Accept Date: 19 October 2016
  • First Publish Date: 20 January 2017