University of Khartoum

Evaluation of Sorghum Harvesting Systems in Agadi Area

Evaluation of Sorghum Harvesting Systems in Agadi Area

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Title: Evaluation of Sorghum Harvesting Systems in Agadi Area
Author: Gasim, Ibrahim Mohamed
Abstract: Field work was conducted at the Arab Sudanese Blue Nile Agricultural Company Farms in Agadi area (Damazin) to evaluate sorghum harvesting systems, namely the mechanized, the partially mechanized and the manual, during 1994/95 season, through the determination of harvesting losses in the three systems. In direct combine harvesting system, a class combine harvester was used to determine harvesting losses at different levels of the functional units, such as preharvesting, gathering, cylinder and tailings. The losses at different levels mentioned above were 3.9%, 15.4%, 1.26% and 7.3% of the total yield respectively. The total direct combining harvesting losses were found to be 27.86% of the total yield. The value that would have been saved if there were no losses was found to be £46320/ton, (38.6 dollars) and the operating cost / ton was £27320 (23.0 dollars). The total cost of harvesting was (the value lost/ton + operating cost/ton) = £ 74153/ton (61.8 dollars/ton). When using partially mechanized harvesting system, the harvesting machine was only used in threshing, therefore harvesting losses considered were those of the discharge (Cylinder, walkers and shoe losses). Other sources of losses such as preharvesting and gathering losses were cut down through careful hand picking. Harvesting losses using this system were found to be 8.56% of the total yield. In this study the value that would have been saved if there were no losses was found to be £ 11230/ton (9.4 dollars/ton and the total operating cost/ton was £ 24000 (20 dollars). The total cost of harvesting using this system was (the value lost/ton + operating cost/ton) £35230/ton (29.4 dollars/ton). When using the manual harvesting system the losses counted were those of the threshing using mudgag, since cutting and gathering operations were done through careful hand picking. Harvesting losses were found to be 10.0% of the total yield. In the present study the value that would have been saved if there were no losses was found to be = £ 13320/ton (11.1 dollars/ton) and the operating cost/ton was = £ 28000/ton (23.33 dollars/ton). The total cost of harvesting using this system was (the value lost/ton + the operating cost/ton) + £ 41320/ton (34.4 dollars/ton). When evaluating the three harvesting systems of sorghum, considering the value of the crop lost in harvesting/ton, in addition to the operating cost/ton, it was found that: Direct combine harvesting system had a high loss percentage compared to the partially mechanized and manual harvesting systems, and this is true for the total cost of harvesting. The partially mechanized harvesting system has benefited from low labour wages in cutting the crop. The loss sources were reduced from 27.486% in direct combining to only 8.56% (of the discharge losses) that reduced the lost value in the direct combining which was £ 46320/ton to only £ 11320/ton, accordingly this system is the most suitable harvesting system at present and the foreseeable future , because of its relatively low cost . Unlike direct combining , partially mechanized harvesting system gives the farmer a free hand to choose the variety he likes and what the consumer demands since cutting of the drop is manually done. Although manual harvesting system was found in this study to have relatively low harvesting cost/ton compared to direct combining, it had some drawbacks which included: a- The system is not suitable for large scale production, it is only suitable for subsistent production. b- Hand harvested grains are generally mixed with other foreign materials.
URI: http://khartoumspace.uofk.edu/handle/123456789/14931
Date: 2015-06-24


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