Impact of reel index on header losses of paddy and performance of combine harvesters

Bawatharani, R.; Jayatissa, D.N.; Dharmasena, D. A. N.; Bandara, M.H.M.A.

doi:10.4038/tar.v25i1.8025

Cited by 7 publications

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“…The decrease in grain damage with an increase in feed rate has also been documented by Sabir et al (2005) and Vas and Harrison, (1969). The forward speeds of the combine harvesters observed in field 6 and 7 are more or less in accordance with the findings of Bawatharani et al (2013), which resulted in comparatively lower broken rice percentage as well. This implies that the forward speeds of 0.74 m/s and 0.86 m/s in field 6 and 7 could be suitable in terms of reducing grain breakage as well.…”

Section: Fig 3 Variation In Broken Paddy Percentage From Different supporting

confidence: 85%

Milling recovery and quality of combine harvested paddy: a case study in Batticaloa and Ampara Districts

et al. 2015

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Grain quality directly affects the profitability of a crop. This study investigated the field operational conditions of combine harvesters with respect to the quality of the grain. A total of six brands of combine harvesters were tested in 10 different fields in Batticaloa and Ampara districts. The damages imposed on grains were determined based on the milling quality of the samples. The holistic view of data from farmers' field trials indicated that the combine forward speed, tip velocity of threshing drums and grain moisture content highly influenced the physical damages caused to the paddy grains during milling. Threshing unit tip velocity of the combine harvesters were found to be in the range of 10.35-39.51 m/s. The tip velocity of 10.35 m/s gave the lowest broken percentage of 15.38% and a higher head rice yield of 49.45%. Relatively low percentages of broken rice of 19.32% and 27.45% were obtained at high forward speeds of 1.36 and 2.5 m/s, respectively. This could be due to the creation of cushioning effect on the grains by increasing feed rate. High impacting forces on the grains at increased tip velocities caused the grain fissures which decreased the quality of seed paddy. The lowest grain moisture content of 15.9% yielded a relatively high broken rice percentage of 33.98 kg/ha at the tip velocity of 24.64 m/s. The highest grain damage of 39.94 kg/ha was obtained during milling at the tip velocity of 39.51 m/s at the moisture content of 20.9%.

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Section: Fig 3 Variation In Broken Paddy Percentage From Different supporting

confidence: 85%

Milling recovery and quality of combine harvested paddy: a case study in Batticaloa and Ampara Districts

et al. 2015

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“…This result agrees with the findings of [8] who attributed the large amount of shattering losses to the great vibration of the header due to its fast speed. [9] found that more vibration in the header unit at increasing forward speed of the combine harvester and the mismatch between the speed of the reel and the forward speed of the combine harvester have also led to increased shattering of grain from the panicle [10] stated that forward speed had highly significant effect on header losses. He found that increasing forward speed from 2.4 to 4.28km/h increased header losses.…”

Section: Resultsmentioning

confidence: 99%

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

Musa¹

2021

International Journal of Scientific Advances

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The present study was conducted at the demonstration farm of Massaed Technology Transfer Center, Gezira State, during 2016/2017, to evaluate the effect of combine harvester forward and reel speed on wheat 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, which was arranged in a split plot design with three replications. The results showed that forward speed 4 km/h with reel speed 25 rpm recorded the lowest total header losses (31.8 kg/ha) while the highest losses (90.1 kg/ha) was recorded by the forward speed 6 km/h and reel seed 25 rpm. The lowest processing losses was obtained from the forward speed 6 km/h with reel speed 25 rpm (13.2 kg/ha) while the highest was recorded by the forward speed 4 km/h with the reel speed 45 rpm (38.2 kg/ha). Forward speed 4 km/h with reel speed 25 rpm recorded the lowest total machine losses (56.7 kg/ha) which represents 9.5% of the total yield as compared to 118.0 kg/ha which represents 19.67% of the total yield recorded by the same speed with 45 rpm reel speed. It was concluded that the forward speed 4 km/h with reel speed 25 rpm was appropriate for reducing combined wheat harvesting losses under Gezira Scheme conditions.

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Research on Fuel Consumption for Different Values of Capacity Factor of Engine of Combine Harvester

Rogovskii

Voinash

Соколова

et al. 2021

IOP Conf. Ser.: Earth Environ. Sci.

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In article the authors substantiate that fuel consumption of combine harvester is usually influenced by design features of combine harvester: productivity, engine capacity and fuel efficiency of engine, the size of silo and grain unloading speed, the transport speed of combine, and other design features. The authors found out that specific fuel consumption of combine harvester tends to decrease with increasing of crop yield. When the normative yield, which provides passport throughput of combine, is achieved, further reduction of specific fuel consumption becomes minimal. This reduction is greater for straw – 1:1.0. Therefore, when the ratio of grain to non-grain part of mass is 1:1.5 and yield is increased to 2.5 t/ha, we observe sharp decrease in specific fuel consumption. The straw index also significantly influences the formation of specific fuel consumption of combine harvester, with yield of 4.5 t/ha and ratio of grain to non-grain part of 1:1.0, the specific fuel consumption is 2.83 l/t, and at the same yield and straw rate and ratio of grain to non-grain part of 1:2 the specific fuel consumption is 4.15 l/t (increase of 47%).

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Impact of reel index on header losses of paddy and performance of combine harvesters

Abstract: ABSTRACT. This study investigated the effect of reel index and type of combine harvester on header losses when harvesting the long grain paddy variety

Cited by 7 publications

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Milling recovery and quality of combine harvested paddy: a case study in Batticaloa and Ampara Districts

Milling recovery and quality of combine harvested paddy: a case study in Batticaloa and Ampara Districts

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

Research on Fuel Consumption for Different Values of Capacity Factor of Engine of Combine Harvester

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