Journal of Biosystems Engineering

Korean Society for Agricultural Machinery (한국농업기계학회)
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Comparison of Tillage and Loads Characteristics of Three Types of Rotavators: Rotary-type, Crank-type, and Plow-type

  • Kim, Myoung-Ho (Department of Bio-Industrial Machinery Engineering, Chonbuk National University) ;
  • Nam, Ju-Seok (Department of Biosystems and Biomaterials Science and Engineering, Seoul National University) ;
  • Kim, Dae-Cheol (Department of Bio-Industrial Machinery Engineering, Chonbuk National University)
  • Received : 2013.05.06
  • Accepted : 2013.05.24
  • Published : 2013.06.01
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Abstract

Purpose: This study was conducted to compare tillage and loads characteristics of three types of rotavators in farmland working condition of Korea. Methods: Tillage operations using three types of rotavators, i.e. rotary-type, crank-type and plow-type, were carried out in a dry field of Korea. The same prime mover tractor was used for driving three types of rotavators, and under several operational conditions, tillage characteristics such as actual working speed, rotavating depth, rotavating width, actual field capacity, flow of tilled soil, soil inversion ratio, and pulverizing ratio were measured. In addition, loads characteristics like torque and required power of Power Take-Off (PTO) shaft were calculated. Results: The average rotavating depth was smaller than the nominal value for all rotavators, and the difference was the greatest in the plow-type rotavator. Nevertheless, the plow-type rotavator showed the largest rotavating depth. The rotavating width was the same as the nominal value of all rotavators. The flow of tilled soil at the same operational conditions was the greatest in the plow-type rotavator and was the smallest in the rotary-type rotavator. In the most commonly used gear conditions of L2 and L3, the average soil pulverizing ratio was the greatest in the rotary-type rotavator, and followed by crank-type and plow-type rotavators in order. In the gear L2 and L3, the plow-type rotavator also had the lowest average soil inversion ratio while the rotary-type and crank-type rotavators had the same soil inversion ratio each other. The average torque and power of PTO shaft in the gear L2 and L3 were the highest in the plow-type rotavator. The load spectra of PTO shaft applying rain flow counting method and Smith-Waston-Topper equation to the measured torque showed that the modified torque amplitude was the greatest in the crank-type rotavator. This may come from the large torque fluctuation of crank-type rotavator during tillage operations. Conclusions: The three types of rotavators had different tillage and loads characteristics. The plow-type rotavator had the deepest rotavating depth, the smallest soil inversion ratio, the largest soil pulverizing ratio and required PTO power. Also, the crank-type rotavator showed a large torque fluctuation because of their unique operational mechanism. This study will help the farmers choose a suitable type of rotavator for effective tillage operations.

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References

  1. ASAE standards, 2007. S526.3 SEP2007: Soil and water terminology. St. Joseph, MI: ASAE.
  2. ASAE standards, 2009. EP542 FEB1999: Procedures for using and reporting data obtained with the soil cone penetrometer. St. Joseph, MI: ASAE.
  3. ASAE standards, 2009. S313.3 FEB1999: Soil cone penetrometer. St. Joseph, MI: ASAE.
  4. Cellicorea. 2008. Application of crank-type rotavator. Available at: www.cellicorea.com.
  5. Kim, J. H., U. K. Kim and Y. G. Wu. 2000. Analysis of transmission load of agricultural tractors. Journal of Terramechanics 37(3):113-125. https://doi.org/10.1016/S0022-4898(99)00022-1
  6. Kim, L. Y., H. J. Cho, B. K. Hyun and W. P. Park. 2001. Effects of physical Improvement practices at plastic film house soil. Journal of Korea Society of Soil Science and Fertilizer 34(2):92-97.
  7. Kim, Y. J., S. O. Chung, C. H. Choi and D. H. Lee. 2011. Evaluation of Tractor PTO Severeness during Rotary Tillage Operation. Journal of Biosystems Engineering 36(3):163-170. https://doi.org/10.5307/JBE.2011.36.3.163
  8. Kim, Y. J., S. O. Chung, S. J. Park and C. H. Choi. 2011. Analysis of Power Requirment of Agricultural Tractor by Major Field Operation. Journal of Biosystems Engineering 36(2):79-88. https://doi.org/10.5307/JBE.2011.36.2.79
  9. Lee, H. D., Kim, K. D., Oh, J. J., Kim, C. S., Kim, S. H and K. Y. Na. 2003. Development of rotary for reducing power requirement at a farm tractor rotary tilling: development of device for preventing alien substance from being wound and for preventing soil adherence. Journal of Biosystems Engineering 4:295-304 (In Korea, with English abstract).
  10. Lee, S. K., S. T. Kim and J. K. Woo. 2000. Tillage characteristics of the single-edged rotary blade. Journal of Biosystems Engineering 25(5):269-378.
  11. Ministry for Food Agriculture Forestry and Fisheries. 2006. Development of Optimal Tillage System Based on Soil Physical Properties. Ministry for Food Agriculture Forestry and Fisheries, Gwacheon: Ministry for Food Agriculture Forestry and Fisheries.
  12. Myung, B. S and H. D. Lee. 2009. Research on the actual condition of rotary tilling & rotary power requirement in the central area. Journal of Korean Society of Industrial Application 12(2):79-83.
  13. Nam, J. S., D. C. Kim, M. H. Kim and D. C. Kim. 2012. Tillage Characteristics Estimation of Crank-type and Rotarytype Rotavator by Motion Analysis of Tillage Blades. Journal of Biosystems Engineering 37(5):279-286. https://doi.org/10.5307/JBE.2012.37.5.279
  14. Nam, J. S., D. S. Kang, Y. S. Kang, K. U. Kim and D. C. Kim. 2012. Comparison of work Perfprmance of crank-type and rotary-type rotavators in Korean farmland conditions. Journal of Biosystems Engineering 37(3): 140-147. https://doi.org/10.5307/JBE.2012.37.3.140
  15. National Institute of Agricultural Engineering. 2004. Experimental and research report. Suwon: National Institute of Agricultural Engineering.
  16. Yoo, C. H., J. H. Ryu, C. H. Yang, T. K. Kim, S. W. Kang, J. D. Kim and K. Y. Jung. 2006. Influence of Diagnostic Fertilization and Subsoil Breaking on Soil Physicochemical Properties in Direct Seeding of Rice on Flooded Paddy Surface. Journal of Korean Society of Soil Science and Fertilizer 39(6):334-338.
  17. Varsa, E. C., S. K. Chong, J. O. Aboaji, D. A. Farquhar and F. j. Olsen. 1997. Effect of deep tillage on soil physical characteristics and corn (Zea mays L.) root growth and production. Soil and Tillage Research 43:219-228. https://doi.org/10.1016/S0167-1987(97)00041-X