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| Registros recuperados : 80 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
26/07/1996 |
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Data da última atualização: |
22/01/1998 |
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Autoria: |
FOLLE, S. M. |
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Título: |
The effect of field size and shape on tractor size selection. |
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Ano de publicação: |
1985 |
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Fonte/Imprenta: |
[s.l.]: Silsoe College - Cranfield Institute of Technology, 1985. |
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Páginas: |
44p. |
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Descrição Física: |
M. Sc. Thesis. |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this project was to identify through literature review factors affecting machinery selection and quantify the effect of field size and shape upon tractorized operations. By expressing the equation proposed by Hunt (1983), to calculate pattern efficiency for a headland field pattern, in terms of area and the ratio of length to width of the field for four sizes of tractors with an appropriate size of plough for each, the effect of field size and shape upon tractorized operations were evaluated. This evaluation was made by calculation of a cost factor that is the inverse of pattern efficiency. Area varied from 0.5 to 32 ha in a geometrical progression while the ratio of length to width of the field varied from 1 (square field) up to 5 (rectangular field with length 5 times the width) in steps of 1. Results showed that savings up to 10.3% on mechanisation costs could be achieved by improving the combination of tractor and field size, whilst savings du to field shape varied between 1.1 and 4.1%. Results also showed that these factors influence tractor size selection, mainly where mechanization of small field with short furrow length are being considered. |
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Palavras-Chave: |
Farm equipment; Farm mechanization; Implement; Machinery; Mecanization; Relacao; Tratorized operation. |
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Thesagro: |
Campo; Maquina Agrícola; Mecanização Agrícola; Motor; Seleção; Tamanho; Trator. |
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Thesaurus NAL: |
engines; mechanization; tractors. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02026nam a2200325 a 4500
001 1557778
005 1998-01-22
008 1985 bl uuuu m 00u1 u #d
100 1 $aFOLLE, S. M.
245 $aThe effect of field size and shape on tractor size selection.
260 $a[s.l.]: Silsoe College - Cranfield Institute of Technology$c1985
300 $a44p.$cM. Sc. Thesis.
520 $aThe objective of this project was to identify through literature review factors affecting machinery selection and quantify the effect of field size and shape upon tractorized operations. By expressing the equation proposed by Hunt (1983), to calculate pattern efficiency for a headland field pattern, in terms of area and the ratio of length to width of the field for four sizes of tractors with an appropriate size of plough for each, the effect of field size and shape upon tractorized operations were evaluated. This evaluation was made by calculation of a cost factor that is the inverse of pattern efficiency. Area varied from 0.5 to 32 ha in a geometrical progression while the ratio of length to width of the field varied from 1 (square field) up to 5 (rectangular field with length 5 times the width) in steps of 1. Results showed that savings up to 10.3% on mechanisation costs could be achieved by improving the combination of tractor and field size, whilst savings du to field shape varied between 1.1 and 4.1%. Results also showed that these factors influence tractor size selection, mainly where mechanization of small field with short furrow length are being considered.
650 $aengines
650 $amechanization
650 $atractors
650 $aCampo
650 $aMaquina Agrícola
650 $aMecanização Agrícola
650 $aMotor
650 $aSeleção
650 $aTamanho
650 $aTrator
653 $aFarm equipment
653 $aFarm mechanization
653 $aImplement
653 $aMachinery
653 $aMecanization
653 $aRelacao
653 $aTratorized operation
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