Agricultural Technology
Mostrando 25-36 de 192 artigos, teses e dissertações.
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25. METHODOLOGY FOR DIMENSIONING OF A CENTER PIVOT IRRIGATION SYSTEM OPERATING WITH DRIPPER TYPE EMITTER
ABSTRACT: In Brazil, the conventional center pivot is widely used for irrigation of agricultural crops and its use has grown continuously. However, when improperly managed, it facilitates the development of diseases in all parts of the plant, with a direct effect on productivity, besides favoring losses of water by evaporation. The drip may be an alternative
Eng. Agríc.. Publicado em: 2017-08
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26. Brazilian Science and Technology Policy and the Case of Embrapa Semiarid
Abstract This study focuses on Brazil’s international co-operation in science and technology (S&T), notably technical transfers to the semiarid branch of the Brazilian Agricultural Research Corporation (Embrapa) from the early 1990s onwards. It is based on interviews with Embrapa personnel, as well as literature and documentary reviews. It starts by outli
Contexto int.. Publicado em: 2016-08
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27. Complementarity in the adoption of traceability of beef cattle in Brazil
Abstract Complementarity is an interesting approach to explain technology adoption. Taking account the other activities the farm performs in its production strategy can help understanding the decision on the adoption of new agricultural technology. This paper aims to evidence the existence of synergic effect resulting from the joint adoption of feedlot and t
Prod.. Publicado em: 06/05/2016
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28. Enfoques y Prácticas de Extensión Rural Públicas en el Noreste Argentino ,
Abstract: Extension approaches and practices have changed enormously during the last decades. At the same time, several authors have pointed out the persistence of traditional, diffusionist approaches in extensionists' practices as well as in extension institutions. In this research, extension practices implemented in the Argentine Northeastern region are an
Rev. Econ. Sociol. Rural. Publicado em: 2016-03
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29. Technological risks, transgenic agriculture and alternatives
After discussing the transformation of age-old agricultural practices that has been occurring since the mid nineteenth century, and its impact on the natural environment, I identify four features of technology that point to the ambiguity of the idea of "technological progress". These are linked to the intrinsic unpredictability (and uncertainty) of technolog
Sci. stud.. Publicado em: 2014
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30. Scale of operation, allocative inefficiencies and separability of inputs and outputs in agricultural research
In this article we consider some properties of concern for research production at Embrapa. We apply statistical tests to address questions related to the scale of operation, the presence of allocative inefficiencies and separability of inputs and outputs. The production process is assessed by nonparametric methods with the use of Data Envelopment Analysis. T
Pesqui. Oper.. Publicado em: 25/10/2013
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31. Del campo al laboratorio: la institucionalización de la biología molecular en Argentina
This article aims to investigate the process of institutionalization of a new scientific discipline. In particular, the displacements that occur between disciplines with the emergence of a new one: molecular biology. The case presented in this article is the National Institute of Agricultural Technology (INTA) of Argentina, institution created in 1956 for re
Sci. stud.. Publicado em: 2013
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32. Capitalismo tardio e educação profissional : as escolas agrotécnicas federais mineiras de Barbacena, Rio Pomba e Uberlândia (1940-1970)
This research aimed at salvaging the history of creation of three school institutions from Minas Gerais State (Brazil), as far as history, capitalism and education are concerned, focusing on the Professional Education, mainly for the Agricultural Teaching: Uberlândia Campus, belonging to the Federal Institute of Education, Science and Technology of Triângu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/11/2012
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33. Gestão financeira e econômica da propriedade rural com multiproduto
Farmers have always neglected management procedures in their enterprises in detriment to initiatives regarding production technology. Overall, producers and technicians know the answer to what, how and when to produce, but they dont know the cost or profitability of this technology. The present study shows the importance of the sustainability of agricultural
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/08/2012
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34. Automatização de um pulverizador hidropneumático visando o controle do espectro de gotas em função do déficit de pressão de vapor dágua do ar / Automation of a hydro-pneumatic sprayer for controlling droplet spectrum in function of deficit of water vapor pressure in the air
Pesticide spraying is one of the most repeated operations in farms, this has occurred mainly due to adoption of no tillage. Facility for purchasing pesticides is notorious throughout Brazil. However, technology for its application has been difficult to reach the producers, even in regions with high agricultural potential. This work aimed to develop a system
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/04/2012
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35. Resposta da cultura do milho aos fertilizantes fosfatados e nitrogenados revestidos com polímeros / Response of maize to polymer-covered phosphate and nitrogen fertilizers
The effective use of fertilizers, besides resulting in greater yield, can reduce production costs, with positive results in the end of the cropping season. Soil correction and fertilization in intensive maize production systems represent, on average, 40% to 45% of the production cost. Phosphorus is considered as a nutrient with low absorption by plants due t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/01/2012
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36. Fosfato monoamônio revestido com polímeros no plantio das culturas de milho irrigado e cana-de-açúcar
Phosphorus (P) is the most limiting nutrient, in tropical conditions, for crop yield, mostly due to its low contents and high fixation in soils. Moreover, it is common to observe low efficacy of phosphate fertilizers, with plant absorption varying from 20% to 30%. Therefore, the reduction of phosphate fertilizers expenses and, or, increasing its efficacy, co
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/01/2012