Measurement of Combine Losses for Corn and Soybeans in Brazil

Paulsen, Marvin R; Pinto, Francisco de Assis de Carvalho; Sena, Darly Geraldo de; Zandonadi, Rodrigo Sinaidi; Ruffato, Solenir; Costa, Anderson Gomide; Ragagnin, Vilmar Antônio; Danao, Mary‐Grace C.

doi:10.13031/aea.30.10360

Cited by 10 publications

(17 citation statements)

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“…In this study the threshing loss is relatively high as compared to Paulsen et al [13] combine harvesters investigations in corn harvesting. The reason for this difference is that in the combine harvester cobs with unthreshed grains were returned to rethreshing.…”

Section: R mentioning

confidence: 56%

“…When threshing corn ears, the following three technological processes take place inside the threshing crescent: corn ears are threshed, i.e., grains are separated from ear cobs; threshed grains are separated through the mass being threshed and the concave grates; and the entire mass being threshed is transported over the surface of the concave toward the straw walkers. Grains remaining on cobs that are passed onto the straw walkers are considered to be the threshing loss N. The tolerable level (0.3% of yield) of threshing loss for combines in corn should not be exceeded [3,13]. The proportion of threshed grains not separated through the concave are considered to be the grain separation loss K. Petkevichius et al [3] stated that separation loss should not exceed 20% of grain feed rate by corrected adjustment of threshing apparatus; i.e.…”

Section: Methodsmentioning

confidence: 99%

“…As a result of these impacts, not only do corn grains separate from the cobs of corn ears, but the cobs are also crushed, causing their smallest parts to fall through the concave holes while the remainder are passed onto the straw walkers. Excessive cylinder speed and tight clearances between the cylinder and the concave can lead to split corn grain and excessive cob breakage [13]. Too many broken cobs can lead to overwhelm the cleaning shoe [3].…”

Section: Average Length Of Crushed Cobsmentioning

confidence: 99%

“…Too many broken cobs can lead to overwhelm the cleaning shoe [3]. It was also found that threshing losses consisted primarily of broken cobs with kernels still attached [13].…”

Section: Average Length Of Crushed Cobsmentioning

confidence: 99%

See 3 more Smart Citations

Corn Ear Threshing Performance of Filler-Plate-Covered Threshing Cylinders

Kiniulis

Steponavičius

Andriušis

et al. 2017

mech

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Section: R mentioning

confidence: 56%

Section: Methodsmentioning

confidence: 99%

Section: Average Length Of Crushed Cobsmentioning

confidence: 99%

“…Too many broken cobs can lead to overwhelm the cleaning shoe [3]. It was also found that threshing losses consisted primarily of broken cobs with kernels still attached [13].…”

Section: Average Length Of Crushed Cobsmentioning

confidence: 99%

See 2 more Smart Citations

Corn Ear Threshing Performance of Filler-Plate-Covered Threshing Cylinders

Kiniulis

Steponavičius

Andriušis

et al. 2017

mech

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“…The operator then optimally varies the harvester's ground speed to maintain a constant crop material feed rate [4]. The operator can also control the efficiency of the crop threshing unit by changing the clearance between the rotating cylinder and the concave and the rotational speed of the cylinder [8,9]. Operating parameters, such as threshing cylinder speed and concave clearance, are the most important factors influencing the power consumption of the threshing apparatus and the grain loss [1,10].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Indicators of a Corn Ear Threshing Process Influenced by the Threshing-Separation Unit Load

Kiniulis

Steponavičius

Kemzūraitė

et al. 2018

mech

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Corn ear feed rate variations in the threshing-separation unit of a combine harvester have a significant impact on the dynamic indicators of the threshing process. In this study, we conducted experiments using a stationary tangential threshing device and measured the forces acting on the rear part of the concave as well as the torque of the rotating cylinder during a threshing process. The ThreshLab software was developed for this purpose. We found that increasing the corn ear feed rate made the threshing process more even, due to decreasing the fluctuation of forces acting on the rear part of the concave and torque of the rotating cylinder. The corn ear threshing process may be more stable if the threshing cylinder is fitted with filler plates (FP-II). A comparison of the results obtained for variations in the forces acting on the rear part of the concave with those obtained for variations in the total torque of resistance and the speed of the threshing cylinder revealed a linear correlation between these parameters at varied feed rates. DOI: http://dx.doi.org/10.5755/j01.mech.24.4.20721

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Impact of Delayed Harvest on Corn Yield and Harvest Losses

Turner¹,

Jackson²,

Sama³

et al. 2021

Applied Engineering in Agriculture

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Highlights Changes in yield, losses, and quality due to delayed harvest were evaluated. No significant changes in potential yield were observed over three years. Observed yield decreased late season with lodging present. Losses at the combine head represented largest fraction of measured loss. Abstract . Potential changes in yield and harvest losses that can occur while field drying corn are key considerations when evaluating harvest timing and energy costs associated with artificial drying. This study presents a three-year evaluation of corn harvest in Kentucky. Potential yield, observed yield, measured losses, and quality changes were monitored in a single field at multiple points over the harvest season to assess changes with respect to time and moisture. Measured losses were typically less than 1% of the potential yield in a good standing crop, consistent with results from cooperator combines (0.8% to 2.4%). When lodging was present, variability increased, and measured losses increased to between 5.3% and 9.1% of the potential yield, primarily as a result of ears missed by the combine head. No significant changes in potential yield were found, indicating potential yield was stable over the period examined. In two of the three seasons evaluated, extended delays resulted in an increase in lodging, and the observed yield was significantly reduced by up to 42.5%. Allowing the grain to field dry generally improved test weight; however, there was a trend of increased mold and other damage with prolonged field drying in one season. Keywords: Combines, Grain quality, Harvest loss, Maize, Preharvest loss.

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Measurement of Combine Losses for Corn and Soybeans in Brazil

Cited by 10 publications

References 0 publications

Corn Ear Threshing Performance of Filler-Plate-Covered Threshing Cylinders

Corn Ear Threshing Performance of Filler-Plate-Covered Threshing Cylinders

Dynamic Indicators of a Corn Ear Threshing Process Influenced by the Threshing-Separation Unit Load

Impact of Delayed Harvest on Corn Yield and Harvest Losses

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