The average young’s modulus ranged from 0.79 to 3.99 GPa. The young’s modulus in bending also decreased as the moisture content and diameter of stalks increased. The average bending stress value varied from 9.71 to 47.49 MPa.
The value of the bending stress at low moisture content was obtained approximately 3 times higher than at high moisture content. The bending stress decreased as the moisture content increased. The experiments were conducted at a moisture content of 10, 20, 40 and 80% w.b. Identifying the physical and engineering characteristics of cereal crop grains is very important to optimize the design parameters of agricultural equipment used in their harvesting, threshing, production, handling and storage processes.īending stress, young’s modulus, shearing stress and shearing energy were determined for alfalfa ( Medicago sativa L.) stem by Galedar et al. It is obvious that productivity of agriculture is strongly related to, among other factors, the timely and efficient pre-harvest and post-harvest operations. Most of the farmers in the country usually prepare their land either using human power or draught animals (personal observation).ĭifferent researchers determined the mechanical and physical properties of different plants. Tef is a labor intensive crop, each activities/pre-harvest and post-harvest/mostly done by traditional practice. Preferred feed for animals and Tef has a fine stemmed straw which can be firmly stacked in such a way to minimize percolations of rain water and exposures to other inclement weather conditions. Tef is the typical crop and staple food for Ethiopians. Tef ( Eragrostis tef (Zucc.) Trotter) is one of the dominant crops in terms of area coverage and production. Also in production cereals contributed 84.96% (about 196,511,515.46 quintals) of the grain production. The area coverage out of the total grain crop area is 78.17% (9,601,035.26 hectares) was under cereals. Different types of cereals are grown in almost all regions of Ethiopia. Mechanical properties than some cereals, it is recommended to identify theįiber properties and use as material for composite.Įlasticity, Flexural rigidity, Shear stress, Tef stem, VarietyĮthiopian economy is much dependent on agricultural production, where crop production contributes largely to the local and export markets. That has better modulus of elasticity, flexural rigidity and diameter of the To tackle the problem of lodging it is better to look on the morphological The varieties and their individual mechanical and physical properties providesĪ path forward for tailoring harvesting, threshing and separation operations. The ability to track significant differences between Moisture contents was 8.58 and 32.12 Mpa 6.30 and 28.40 Mpa 10 and 26.30 Mpa Ģ and 29.60 Mpa at upper and bottom position for Local, Kora, Quncho and Guduru Quncho and Guduru varieties, respectively. Moisture level 5.5% and 19.70% at upper and bottom position for Local, Kora, The results indicated that the minimumĪnd maximum value of modulus of elasticity was 0.13 and 2.6 Gpa at moisture Moisture content, diameter and thickness of the Tef stem and analyzed their mechanical properties using TextureĪnalyzer and Universal Testing Machine. (Quncho) and Dz-01-1880 (Guduru) were determined. Stem the major four varieties, viz., Local, Dz-Cr-438-(Kora), Dz-Cr-387/RIL-355
In this study mechanical properties of tef Typical crop growing in most areas of Ethiopia, with the first area coverage. Tef ( Eragrostis tef (Zucc.) Trotter) is a
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