Tractors and their Power Units

Liljedahl, J. B.; Turnquist, Paul K.; Smith, David W.; Hoki, Makoto

doi:10.1007/978-1-4684-6632-4

Cited by 41 publications

(33 citation statements)

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“…Among the major crops grown were rubber, oil palm, cassava, yam, cocoyam and pepper. However, their productivities were low, because, as Liljedahl et al [2] stated, 'human beings are limited to less than 0.1 kW continuous power output'. To overcome this limitation, the introduction of agricultural mechanization in the State started during the period of the first military administration (1967)(1968)(1969)(1970)(1971)(1972)(1973)(1974)(1975)(1976) with the procurement of the first batch of tractors and associated farm implements in 1971.…”

Section: Historic Perspectivementioning

confidence: 96%

Farm mechanization leading to more effective energy-utilizations for cassava and yam cultivations in Rivers State, Nigeria

et al. 2006

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Surveys have been conducted, under the auspices of the Ministry of Agriculture and Agricultural Development Projects (ADPs), in the 23 local-government areas of the Rivers State, Nigeria. A structured questionnaire, personal visits to farms and interactions with information repositories were used. The quantities of energy consumed by tractors used in activities associated with the growing of cassava and yam crops in those areas were compared with traditional operations, using just manual labour. Within the period of 1986-2004, the total energy utilizations in the production of these crops, in the 23 local government areas, were 2738.87 and 33.5 MJ for tractor-power and traditionalmanual operations, respectively. The tractorization intensity (TI) dropped from 0.352 hp/ha in 1986 to 0.345 hp/ha in 2004. This result was below the presently advocated 0.5 hp/ha for agricultural operations in order to increase crop production. This study identified the causes of this shortfall and recommended, at least for the short-term future, that farm industrialization of all sectors should be subsidized.

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Section: Historic Perspectivementioning

confidence: 96%

Farm mechanization leading to more effective energy-utilizations for cassava and yam cultivations in Rivers State, Nigeria

et al. 2006

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“…Diasumsikan bahwa roda kaku, dan masuk pada permukaan tanah sedalam z (sinkage). Untuk roda bersirip, siripnya masuk ke permukaan tanah sehingga menghasilkan geseran tahanan tanah.Gaya geser F r yang dihasilkan dihitung dengan persamaan [1] (Liljedahl,et al, 1989). Untuk roda tanpa sirip, gaya gesek roda dengan permukaan tanah F f dihitung dengan persamaan [2].…”

Section: Metering Deviceunclassified

Evaluation of Driving System and Modification of Corn Planter Powered by Hand Tractor

Hermawan¹,

Mandang²,

Sutejo³

et al. 2015

JTEP

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“…2) which are a function of the interfacial forces and slip [1,12,14]. The wheel is in a towed state when the torque is zero; the associated slip is designated as i towed .…”

Section: Introductionmentioning

confidence: 99%

Slip-based experimental studies of a vehicle interacting with natural snowy terrain

Lee¹,

Huang²,

Johnson³

et al. 2012

Journal of Terramechanics

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Tractors and their Power Units

Cited by 41 publications

References 0 publications

Farm mechanization leading to more effective energy-utilizations for cassava and yam cultivations in Rivers State, Nigeria

Farm mechanization leading to more effective energy-utilizations for cassava and yam cultivations in Rivers State, Nigeria

Evaluation of Driving System and Modification of Corn Planter Powered by Hand Tractor

Slip-based experimental studies of a vehicle interacting with natural snowy terrain

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