The effect of some crop and soil parameters on mechanical damage and Mechanical properties of potato during and after harvesting

Document Type : Research Paper


In this study, the effect of variety, harvesting time and soil moisture on mechanical of samples, during harvest and storage time of two month. Moreover, the effect of these parameters on rheological properties such as rupture energy, Strength against penetration, and stress relaxation has been investigated using factorial design. The results showed that variety, harvesting time and soil moisture have a significant effect on potato damage during harvesting and after storing time. From this point of view, Agria, Sante and Fontane varieties have the most damages respectively. The maximum amount of damages was related to soil moisture with situation of wilting point (9 percent), and minimum amount of damages was related to soil moisture with field capacity (15 percent). During harvesting the Max and Min amount of losses were obtained during early harvesting (middle of September) and late harvesting (middle of October), respectively.
The maximum and minimum energy required for rupture was 87.22 and 73.34 E-3 joule related to Fontane and Agria respectively. Strength against penetration was 6.76, 6.56 and 6.26 N for Fontane, Sante and Agria respectively. Max amount of stress relaxation was 72.36% for Fontane by Santa and Agria with 71.20 and 69.04 percent.


Main Subjects

Anonymous. (2000). ASAE standard. Compression of food materials of convex shape. ASAE S368.3 MAR 95.
Anonymous. (2014). Agricultural  Statistical Bulletin. Ministry of Jihad-Agriculture. Khorasan Organization. (in Farsi.(
Baritelle A L; Hyde G M; Thornton R; Bajema R (2000). A classification system for impact-related defects in potatotubers. American Journal of Potato Research, 77(3),143–148.
Bentini M; Capara C; Martelli R. (2006). Harvesting Damage to Potato Tubers by Analysis of Impacts recordedwith an Instrumented Sphere. Biosystems Engineering, 94 (1), 75–85.
Bishop, Chris F.H., (1980). Potato mechanization storage. First publication. Farming press LTD. Pp. 97-130.
Eshaghbeygi, A and Besharati, S. (2009). Potato variety and storage for tuber sensitivity in bruising. World applied science journal, 7 (12): 1504-1507.
Hasan Abadi, H., Majidi, E. and Niamanesh, H. (1999). Investigation on The Effect of Temperature Thresholds on The Tuber Growth Process and Secondary Growth In Various Potato SVs In Ardabil Region . Seed and Plant Improvement Institute. (in Farsi).
Hasan Abadi, H. and Hasan Panah. D. (2002). Study, Evaluation And comparison on TPS Drived Tubers and Commercial Cultivars. Research Repot. Seed and Plant Improvement Institute. (in Farsi).
Hyde, G.M., Thornton, R.E., Woodruff, D.W. (1983). Potato harvester performance with automatic chain load control. Transactions of the ASAE. Vol.26.
Khater, I. M. M. (2009). Effect of working speeds of mechanical harvesting on potato damage in south eastern Qantara. 4th Conference on Recent Technology in Agriculture. 3-5 Nov. Cairo, Giza, Egypt.
Malcom, E. (2002). Food Texture and Viscosity (Concept and Measurment). Elsevier Sience and Technology Books.
Peters, R., (1996). Damage of potato tubers, a review. Potato research, 39, 479-484.
Van Zeebroeck, M., Van linden, V., Darius, P., De Ketelaere, B., Ramon, H., and Tijskens, E. (2007). The effect of fruit properties on the bruise susceptibility of tomatoes. Postharvest Biology and Technology, 45, 168-175.
Yasin,M & M. Mehmood Ahmad. (2003). Design, and performance evaluation of rotary potato digger development .vol .34. no.2. Agricultural Mechanization in Asia, Africa, and Latin America. Vol.34(2): P, 43-46.
www. FAO. org. Source: Jarasolis, Alvaro. 1991. file:// Potato.  Waste. Htm