University of Khartoum

Influence of Combine Harvester Forward and Reel Speeds on Wheat Harvesting Losses in Gezira Scheme (Sudan)

Influence of Combine Harvester Forward and Reel Speeds on Wheat Harvesting Losses in Gezira Scheme (Sudan)

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Title: Influence of Combine Harvester Forward and Reel Speeds on Wheat Harvesting Losses in Gezira Scheme (Sudan)
Author: Musa, Mukhtar Mohammed Hussein
Abstract: An experiment was conducted in Gezira Scheme (Massad Center for Training and Testing); during 2016/2017 season, with the objective of determining the effect of combine harvester forward and reel speed on wheat main harvesting losses (total header, processing and total machine losses). Three combine harvester forward speeds (4, 5 and 6 km/h), and three reel speeds (25, 35 and 45 rpm) were used in the experiment. The experiment was carried out in a split plot design with three replications. Data were analyzed by SPSS computer program. Forward speed of 5 km/h and reel speed of 35 rpm were used as reference speeds for operating the combine harvester (the common practice in Gezira Scheme). Other adjustments (cylinder speed, concave clearance, sieve openings and fan speed) were kept constant. Result showed that the combination of the forward speed of 4 km/h and reel speed of 25 rpm resulted in the lowest total header losses (31.75 kg/fed) as compared to the highest total header losses (90.09 kg/fed) which was recorded for the forward speed of 6 km/h and reel seed of 25 rpm. The lowest processing losses was obtained for the forward speed of 6 km/h with reel speed of 25 rpm (13.15 kg/fed) while the highest was recorded by the forward speed of 4 km/h with the reel speed of 45 rpm (38.15 kg/fed). The combination of forward speed of 4 km/h with reel speed of 25 rpm recorded the lowest total machine losses (56.74 kg/fed which represents 9.5% of the total yield) as compared to the highest machine losses (118.02 kg/fed which represents 19.67% of the total yield) which was recorded by the same speed with 45 rpm reel speed. It was concluded that the forward speed of 4 km/h with reel speed of 25 rpm were appropriate for reducing wheat harvesting and they are recommended under Gezira Scheme conditions.
URI: http://khartoumspace.uofk.edu/123456789/27163


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