Development and performance of a high output rotary digger

Chamen, W. C. T.; Cope, R. E.; Patterson, Daniel E.

doi:10.1016/0021-8634(79)90072-6

Cited by 23 publications

(6 citation statements)

References 1 publication

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“…The increase in power was due to the increased bite length as a result of the increased travel speed. Similar trend was also observed by Chamen et al 1 and Hendrick and Gill 9 . In general, the rotary tiller operation is largely dependent upon the rotor speed and the travel speed of the tractor.…”

Section: Power Modelsupporting

confidence: 89%

“…However, the specific energy of a disk harrow was 37% lower than that of rotary tiller. Similarly, Chamen et al 1 reported that the specific energy for their rotary digger with rigid chisel tine behind on cereal crops was 50% less than the mouldboard plough operating at same tillage depth. According to them, the significant a increase in fuel consumption and specific energy for a rotary tiller over a disk harrow could be due excessive soil pulverisation by the rotary tiller within a single pass for seedbed preparation.…”

Section: Power and Energy Requirementsmentioning

confidence: 97%

“…As far as the quality of the seedbed is concerned, one pass of powered implement is equivalent to several draught implement operations. Charmen et al 1 reported that a powered implement that include rigid chisel requires 50% less energy than a mouldboard plough operating at the same depth. Hendrick 2 developed a powered rotary chisel with a single rotor and compared the power requirements with that of a rigid chisel.…”

Section: Introductionmentioning

confidence: 99%

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Empirical Models for Power and Energy Requirements II : A Powered Implement Operation in Serdang Sandy Clay Loam, Malaysia

Kheiralla

Yahya

Zohadie³

et al. 2017

AJSTD

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Power and energy requirements were measured with an instrumented tractor for rotary tilling in Serdang sandy clay loam soil. The effects of travel speed and rotor speed upon the measured data were investigated. Power model from orthogonal regression analysis was formulated based on linear and quadratic functions of travel speed and bite length. Fuel consumption model from regression analysis was formulated based on linear tractor PTO power as well as linear equivalent tractor PTO power. Fuel consumption rates predicted by ASAE D497.3 were found to be 25% to 28% overestimates of the values predicted by the model developed. However, fuel consumption rates reported by OECD Tractor Test were found to be 1% to 9% lower than the fuel consumption rates predicted by the model developed. A comparison of power and energy requirements for both powered and draught implements showed that the disk harrow was the most energy efficient implement in terms of fuel consumption and specific energy followed by the rotary tiller, disk plough and mouldboard. Finally, average PTO power, fuel consumption, wheel slip, wheel power and specific energy for a powered implement are presented.

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Section: Power Modelsupporting

confidence: 89%

Section: Power and Energy Requirementsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Empirical Models for Power and Energy Requirements II : A Powered Implement Operation in Serdang Sandy Clay Loam, Malaysia

Kheiralla

Yahya

Zohadie³

et al. 2017

AJSTD

View full text Add to dashboard Cite

show abstract

“…The whole site was cultivated in 1980 to a depth of between 30 and 35 cm using a Rotadigger (Chamen et al, 1979) to loosen any existing compact soil. The plots were left to settle unwheeled, under a crop of winter oats, for one growing season before wheeling began prior to drilling in autumn 1981.…”

Section: A T E R I a L S A N D M E T H O D Smentioning

confidence: 99%

Compaction of a swelling clay soil by agricultural traffic; effects upon conditions for growth of winter cereals and evidence for some recovery of structure

Blackwell

Ward

Lefèvre

et al. 1985

Journal of Soil Science

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SUMMARY A swelling stagnogley soil remained unwheeled or was uniformly wheeled by a combine harvester and a tractor in two successive autumns before direct drilling winter cereals. Combine wheeling of the soil at its wettest condition caused the largest loss of soil porosity. The autumn and spring of the second growing season for the winter cereals were wetter than long term average. The smaller porosity in the wheeled soil, created lower soil redox potential and smaller oxygen flux as well as greater soil strength and larger amounts of available water, but little difference in soil temperature. The crop in the wheeled soil had fewer plants, less root and a lighter yield than in the unwheeled soil. The wheeled soil recovered some porosity and lost strength after wetting and drying during the second growing season, whereas soil freezing had very little effect. This restructuring was sufficient to reverse some of the detrimental effects of compacting the soil.

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“…While studying the performance of different shaped blades (L, C and J), L shaped blades required more power and more forward thrust was also obtained. C shaped blades required 30% less power than the L shaped blades [9,10]. L type blade required 18.1% more specific work than C type blade due to reduction in surface area of C type blade.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modelling for Power Requirement of Power Take-Off of Rotary Tiller

Kamat

Jain

Poonia

et al. 2020

CJAST

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For better performance and durability of tractor and machinery during field operations, it is necessary to select a proper matching machine/implement. The purpose of the study was to analyse the effect on parameters affecting to power requirement of power take-off (P.T.O) for rotary tiller, development of mathematical modelling and validation of the model under field conditions. Three different regression models (multiple linear regression, weighted least squares and stepwise regression) were used to predict the P.T.O power requirement. All three developed models were observed significant at 1% level with R2 value of 0.945, 0.984 and 0.940 for three models respectively. Correlation analysis was performed and all the parameters expressed positive correlation in relation to P.T.O power requirement. Speed of operation, moisture content, depth of cut, working width, peripheral velocity, number of blades and weight of rotary tiller were shown linear relation with P.T.O power requirement. L shaped blades consumed more power than the J and C shaped blades. Hard soil consumed more power followed by medium and light soil. The Mean Absolute Percentage Error (MAPE) ranged in reasonable limit for all three models. Based on higher R2 value, weighted least square regression model was found to be the best fit model for prediction of P.T.O power requirement of rotary tiller.

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Development and performance of a high output rotary digger

Cited by 23 publications

References 1 publication

Empirical Models for Power and Energy Requirements II : A Powered Implement Operation in Serdang Sandy Clay Loam, Malaysia

Empirical Models for Power and Energy Requirements II : A Powered Implement Operation in Serdang Sandy Clay Loam, Malaysia

Compaction of a swelling clay soil by agricultural traffic; effects upon conditions for growth of winter cereals and evidence for some recovery of structure

Mathematical Modelling for Power Requirement of Power Take-Off of Rotary Tiller

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