• JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
 
  Bookmark and Share
 
 
Doctoral Thesis
DOI
https://doi.org/10.11606/T.11.1900.tde-20240301-144542
Document
Author
Full name
Augusto Testa
Institute/School/College
Published
Piracicaba, 1972
Supervisor
Title in Portuguese
Desbravamento de terras incultas; estudo do desmatamento com lâmina cortadora de árvores e com correntão
Keywords in Portuguese
DESMATAMENTO
MÁQUINAS AGRÍCOLAS
MECANIZAÇÃO AGRÍCOLA
Abstract in Portuguese
No presente trabalho, estudou-se o desbravamento das terras incultas (cuja história foi tratada na revisão bibliográfica) pelo desmatamento mecânico com lâmina Rome K/G e com o correntão. Antes das experiências de campo, procedeu-se à fabricação de uma maqueta da lâmina, que permitiu realizar o estudo das forças atuantes no corte simples e combinado, realizado pela referida lâmina. No decorrer do trabalho, observou-se, nessas experiências, que o diâmetro é mais importante que a altura da árvore, devido ao tipo de trabalho, e salientaram-se as seguintes qualidades: 1) Opera em qualquer declividade. 2) Não altera o solo. 3) Não requer esforços tratorios intermitentes, precisando evitar choques para não danificar o corte da lâmina. 4) Orienta a queda das árvores, arremessando o material cortado fora da área trabalhada, protegendo também o tratorista. Com relação ao correntão, procurou-se estudar o esforço dinamométrico realizado pelos tratores na derrubada da vegetação, a tração deles e os fatores que influem nesse tipo de prática de desmatamento.
Abstract in English
This paper carried out the land clearing on upland woods (whose history was treated on the bibliography references) by the mechanical clearing operation with Rome K/G blade and the anchor chains. Preceding the field experiments, it was made a seale model blade, to study the acting faces on the single and combined cut, made by the proper blade. During the experiments was observed that the diameter of the tree is more important than its height, considering the type of the work. The following qualities must be remarked: 1) Good performance in any declivity. 2) No modification in the soil. 3) No necessity of alternating tractor efforts and must avoid shocks for don’t damage the blade cut. 4) Guide the falling trees, throwing the cut material out of the area, protecting the tractor drive also. In order to use the anchor chain, it was studied the dynamometric effort carried out by the tractors on land clearing. Tractors draft and the agents that have influence in this type of land clearing are also treated.
 
WARNING - Viewing this document is conditioned on your acceptance of the following terms of use:
This document is only for private use for research and teaching activities. Reproduction for commercial use is forbidden. This rights cover the whole data about this document as well as its contents. Any uses or copies of this document in whole or in part must include the author's name.
724758.pdf (21.90 Mbytes)
Publishing Date
2024-03-12
 
WARNING: Learn what derived works are clicking here.
All rights of the thesis/dissertation are from the authors
CeTI-SC/STI
Digital Library of Theses and Dissertations of USP. Copyright © 2001-2024. All rights reserved.