Effect of Moisture Content on Some Physical and Mechanical Properties of Wheat (Triticum aestivum L.) Seeds
DOI:
https://doi.org/10.52151/jae2025622.1922Keywords:
angle of repose, engineering properties, equipment design, friction coefficient, geometric mean diameter, moisture levelAbstract
The design, improvement, and use of seed planting, harvesting, and postharvest equipment depend on the physical and mechanical properties of the specific crop type and variety. However, this information is lacking for wheat varieties produced in different regions of Ethiopia. The objective of this study was to determine the effect of moisture content (8.5%, 13.5%, 18.5%, 23.5%, and 28.5%) on physical and mechanical properties of three wheat varieties (Danda’a, Jalanne, and Kakaba) commonly cultivated in Ethiopia. A factorial combination of 3 (verities) × 5 (moistures levels) treatment levels was adopted with three replications. The variables studied were the grain size, shape, weight, bulk density, angle of repose, and coefficient of friction. The data were subjected to analysis of variance (ANOVA), and the Dunnett multiple range test was used to separate the means. Significance was accepted at p < 0.05. As moisture increased, the grain's dimensions, shape, thousand kernel weight, coefficient of friction, and angle of repose increased while bulk density decreased. The bulk density decreased from 0.73 to 0.54 g cm-³ as moisture increased from 8.5% to 28.5%. The study revealed substantial variation across moisture treatments, underscoring the sensitivity of grain physical properties to hydration levels. The mean values for grain length, surface area, and volume increased from 5.786 ± 0.253 to 6.525 ± 0.361 mm, 38.514 ± 2.997 to 49.627 ± 3.201 mm2, and 22.531 ± 2.644 to 32.933 ± 3.201 mm3, respectively. Similarly, the thousand kernel weight, repose angle, and friction coefficient increased from 26.70 to 42.00 g, 23.20° to 34.70°, and 0.4142 to 0.8391, respectively. Variations in grain properties indicate the necessity for diverse design and calibration criteria for seed planting, harvesting, and postharvest equipment tailored to different wheat varieties at different moisture levels.
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Adinoyi, A., Ajeigbe, H. A., Angarawai, I. I., & Kunihya, A. (2017). Effect of grain moisture content on the physical properties of some selected sorghum varieties. International Journal of Scientific & Engineering Research, 8(6), 1796‒805.
Al-Mahasneh, M. A., & Rababah, T. M. (2007). Effect of moisture content on some physical properties of green wheat. Journal of Food Engineering, 79(4), 1467–1473. https://doi.org/10.1016/j.jfoodeng.2006.04.045
AOAC. (2005). Official Methods of Analysis. Association of Official Analytical Chemists, Washington DC, USA. Available at: https://www.aoac.org/resources/official-methods-of-analysis/ (accessed on 15 May 2025)
ASABE. (2022). S352.2: Moisture Measurement — Unground Grain and Seeds (ASABE Standard S352.2 APR1988 (R2022)). American Society of Agricultural and Biological Engineers, St. Joseph, Michigan, USA.
Baryeh, E. A. (2002). Some physical properties of millet. Journal of Food Engineering, 51(1), 39-46. https://doi.org/10.1016/S0260-8774(01)00035-8
Bentley, A. R., Donovan, J., Sonder, K., Baudron, F., Lewis, J. M., Voss, R, … , & Govaerts, B. (2022). Near-to long term measures to stabilize global wheat supplies and food security, Nature Food, 3,483–486. https://doi.org/10.1038/s43016-022-00559-y
Central Statistics Agency (CSA), (2021). Agricultural sample survey: Report on area and production of major crops (Private peasant holdings, Meher Season). Central Statistics Agency, Addis Ababa, Ethiopia.
Coşkun, M. B., Yalçın, I., & Özarslan, C. (2006). Physical properties of sweet corn seed (Zea mays saccharata Sturt.). Journal of Food Engineering, 74(4), 523-528. https://doi.org/10.1016/j.jfoodeng.2005.03.039
Fayed, M. I. A., El-Shal, M. S., & Omar, O. A. (2020). Determination of some apricot seed and kernel physical and mechanical properties. Agricultural Engineering International: CIGR Journal, 22(4), 229–237.
Food and Agriculture Organization (FAO). (2023). FAOSTAT: Crops and livestock products. Available at: http://www.fao.org/faostat (accessed on 15 May 2025).
Garnayak, D. K., Pradhan, R. C., Naik, S. N., & Bhatnagar, N., (2008). Moisture dependent physical properties of jatropha seed (Jatropha curcas L.). Industrial Crops and Products, 27(1), 123-129. https://doi.org/10.1016/j.indcrop.2007.09.001
Gurracho, B. A., Tola, Y. B., Badie, A. F., Habtegabriel, S. A., & Forsido, S. F. (2024). Assessment of on-farm sorghum grain loss under farmers’ traditional postharvest practices in the East Hararghe Lowlands of Ethiopia. International Journal of Postharvest Technology and Innovation, 9(2), 167–188. https://doi.org/10.1504/IJPTI.2024.138701
Jamali, L. A., Soomro, S. A., Abro, A. A., Khan, Z. A., & Walhari, N. H. (2016). Effect of grain moisture content on physico-engineering properties of wheat. Journal of Agricultural Research, 54(4), 773-785
Kaliniewicz, Z., Żuk, Z., & Krzysiak, Z. (2018). Influence of steel plate roughness on the frictional properties of cereal kernels. Sustainability, 10(4), 1003. https://doi.org/10.3390/su10041003
Karimi, M., Kheiralipour, K., Tabatabaeefar, A., Khoubakht, G. M., Naderi, M., & Heidarbeigi, K. (2009). The effect of moisture content on physical properties of wheat. Pakistan Journal of Nutrition, 8(1), 90-95.
Kenghe, R. N., Jadhav, M. S., & Nimbalkar, C. A. (2015). Physical properties of sorghum (Sorghum bicolour L.) grains as a function of moisture content. International Journal of Engineering Sciences and Research Technology, 4(10), 496–504.
Khanahmadzadeh, A., Goli, H., & Ghamari, S. (2021). Moisture-dependent physical properties of wild safflower (Carthamus oxyacanthus) seeds. Agricultural Engineering International: CIGR Journal, 23 (3), 201–210.
Masane, P. K., Mate, V. N., Borkar, P. A., Murumkar, R. P., Rajput, M. R., & Rathod. P. K. (2016). Physical properties of tender sorghum (Sorghum bicolour L.) grains. Journal of Ready to Eat Food, 3(4), 51–54.
Mohite, A. M., Sharma, N., & Mishra, A. (2019). Influence of different moisture content on engineering properties of tamarind seeds. Agricultural Engineering International: CIGR Journal, 21(1), 220–224.
Mohsenin, N. (1986). Physical Properties of Plant and Animal Materials. Gordon and Breach Science Publishers, New York.
Mwithiga, G., & Sifuna, M. M (2006). Effect of moisture content on the physical properties of three varieties of sorghum seeds. Journal of Food Engineering, 75(4), 480–486. https://doi.org/10.1016/j.jfoodeng.2005.04.053
Nigussie, A., Kedir, A., Adisu, A., Belay, G., Gebrie, D., & Desalegn, K. (2015). Bread wheat production in small scale irrigation user’s agro-pastoral households in Ethiopia: Case of Afar and Oromia regional state. Journal of Development and Agricultural Economics, 7(4), 123-130. https://doi.org/10.5897/JDAE2014. 0589
Ozarslan, C., (2002). Physical properties of cotton seed. Biosystems Engineering, 83(2), 169-174. https://doi.org/10.1006/bioe.2002.0105
Pandey, H., Sawant, C. P., & Chaudhary, V. P. (2025). Engineering Properties of Ginger Rhizomes in Relation to Design of a Seed Planting Mechanism. Journal of Agricultural Engineering (India), 62(1), 58-68. https://doi.org/10.52151/jae2025621.1909
Parde, S. R., Johal, A., Jayas, D. S., & White, N. D. G. (2003). Physical properties of buckwheat cultivars. Canadian Bio-systems Engineering, 45, 3.19-3.22.
Razavi, S. M. A., & Milani, E. (2006). Some physical properties of the watermelon seeds. African Journal of Agricultural Research, 1(3), 65–69.
Sabar, S. S., Swain, S. K., Behera, D., Rayaguru, K., Mohapatra, A. K., & Dash, A. K. (2020). Moisture-dependent physical and engineering properties of sorghum. International Journal of Current Microbiology and Applied Science, 9(8), 2365–2375.
Sahoo, P. K., & Srivastava, A. P. (2002). Physical properties of okra seed. Biosystems Engineering, 83(4), 441-448. https://doi.org/10.1006/bioe.2002.0129
Saparita, R., Hidajat, D. D., & Kuala, S. I. (2019). Statistical analysis on the geometric, physical and mechanical properties of dried robusta coffee cherry resulting from natural system processing. IOP Conference Series: Earth and Environmental Science, 251, 012041. https://doi.org/10.1088/1755-1315/251/1/012041
Sen, D. J., Nandi, K., Patra, F., Nandy, B., Bera, K., & Mahanti, B. (2020). Angle of repose walks on its two legs: Carr’s index and Hausner's ratio. World Journal of Pharmacy and Pharmaceutical Sciences, 9(5), 1565 -1579. https://doi.org/10.20959/wjpps20205-16174
Shahbazi, F. (2014). Evaluation and modelling some engineering properties of three safflower varieties. Agronomic Research in Moldavia (Cercetări Agronomice în Moldova), XLVII (4), 23-40.
Simonyan, K. J., El-Okene, A. M., & Yiljep, Y. D. (2007). Some physical properties of Samaru sorghum 17 grains. Agricultural Engineering International: the CIGR Ejournal, 9, 1–15
Surpam, T. B., Pardeshi. I. L., & Rokade, H. N. (2019). Engineering properties of sorghum. International Journal of Chemical Studies, 7(5), 108–110.
Tabatabaeefar, A. (2003). Moisture-dependent physical properties of wheat. International Agrophysics, 17(4), 207-211.
Tavakoli, M., Tavakoli, H., Rajabipour, A., Ahmadi, H., & Gharib-Zahedi, S. M. T. (2009). Moisture-dependent physical properties of barley grains. International Journal of Agricultural and Biological Engineering, 2(4), 84-91. https://doi.org/10.3965/j.issn.1934-6344.2009.04.084-091
Worley, J. W., Thompson, S. A., & Bucklin, R. A. (2024). Moisture-dependent physical properties of grains: Implications for harvest and postharvest operations. Transactions of the ASABE, 67(2), 123-135. https://doi.org/10.13031/xyz.12345
Zegeye, F., Alamirew, B., & Tolossa, D. (2020). Analysis of wheat yield gap and variability in Ethiopia. International Journal of Agricultural Economics, 5(4), 89–98. https://doi.org/10.11648/j.ijae.20200504.11
