Document Type : Review Article


1 Department of Agricultural Machinery Engineering, Faculty of Agricultural Engineering and Technology, University of Tehran, Karaj, Iran

2 Department of Agronomy and Plant Breeding, College of Agriculture, University of Tehran, Karaj, Iran

3 Texas A&M AgriLife Research, Department of Soil and Crop Sciences, USA, Corpus Christi, TX, USA


Fine grain products are harvested in two manual and mechanized forms. Nowadays, common combine harvesters are used, but fine grain products such as Rapeseed, Sesame and Sorghum cannot be harvested with conventional heads of combine harvesters due to the excessive grain loss in the head of the combine. Therefore, the necessity of design and fabricating machines and heads of combine harvesters became the center of attention to researchers because of the nutritional and medicinal benefits of fine-grain products. This research, encompasses an overview of the special headers and machines for harvesting three type of fine grain products with high loss and an evaluation of each of these harvesters.


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