E. Velayati; B. Emadi; M. Khojastehpour; M. H. Saeidirad
Abstract
The study of mechanical properties of Berberis not only is useful for design and optimization of transportation, processing and packaging equipment but also can prevent mechanical injuries and losses. In this study force, deformation, energy and toughness were measured at different moisture content levels ...
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The study of mechanical properties of Berberis not only is useful for design and optimization of transportation, processing and packaging equipment but also can prevent mechanical injuries and losses. In this study force, deformation, energy and toughness were measured at different moisture content levels including 70-76, 45-50, 25-30 and 7-10 percent (w.b.). The decrease of moisture content caused increasing rupture force from 1.387 to 2.679 N, decreasing shape deformation from 3.387 to 2.413mm, increasing toughness from 4.297 to 8.220 J/cm3 and decreasing rupture energy from 0.921 to 0.661mJ. Effects of loading speed, force orientation and their interaction were investigated on just fresh Berberis fruit. It was indicated that only force orientation was effective on all investigated properties except toughness. The moisture content was identified as an effective parameter on terminal velocity. It decreased from 9 to 4.5 m/s with decrease of moisture content from 76 to 7 percent (w.b.).
E. Velayati; B. Emadi; M. Khojastehpour; M. H. Saeidirad
Abstract
In order to enhance the mechanization level of harvest and post-harvest operations of Berberis fruit, as one of the major and local crops of south Khorasan province, some of its physical properties were investigated. Different dimensions, geometrical mean diameter, sphericity, surface area, mass of thousand ...
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In order to enhance the mechanization level of harvest and post-harvest operations of Berberis fruit, as one of the major and local crops of south Khorasan province, some of its physical properties were investigated. Different dimensions, geometrical mean diameter, sphericity, surface area, mass of thousand fruit, true density, bulk density, porosity, static coefficient of friction and the repose angles were determined. The properties and the effect of moisture content on them were studied by the completely randomized designs statistical method. Analysis of data indicated that the change of moisture content caused significant difference (P
M. H. Saeidirad; S. A. Parhizgar
Abstract
The major part of agriculture in Iran and especially in Khorasan province is yeoman farmers, and often the parts are less than one hectare. To evaluate the status of small farm mechanization (less than two hectares) in Khorasan Razavi province, three agricultural sub-regions that running small farms ...
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The major part of agriculture in Iran and especially in Khorasan province is yeoman farmers, and often the parts are less than one hectare. To evaluate the status of small farm mechanization (less than two hectares) in Khorasan Razavi province, three agricultural sub-regions that running small farms were identified. This research was carried out in 2009. The questionnaire was prepared for gathering basis and field information to determine the mechanization coefficients. The questionnaires were completed for total number of farmers in the areas studied. Results showed that mean of mechanization level and total mechanization degree were 3.36 hp per hectare and 37.7 percent respectively. The mean of mechanization degree in tillage was calculated 98.3 percent. The mean power coefficient and the average hectare per tractor were 4.37 and 27.62 respectively. The farmers only use power available for the tillage in these regions. They were not able to use of tractors in other operations, because of being small farm, lack of technical knowledge and lack of implements. Development of mechanization cooperatives, training of farmers and conformity of machine and farm area can increase mechanization indexes and to decrease production costs.
