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Now showing items 31-40 of 1320
Critérios para o aumento do índice de eficiência nos sistemas de irrigação tipo pivô central
(Universidade Federal de Santa Maria, 2010-01-27)
This work proposes improve the study about the efficiency indicators development, to be use in irrigation equipment for pivot. At first, it sought to make some clarifications about the current state of the irrigations ...
MODELAGEM DO DESEMPENHO EM TRAÇÃO DE CONJUNTOS MECANIZADOS VISANDO AO DIMENSIONAMENTO DO TRATOR
(Universidade Federal de Santa Maria, 2010-03-16)
In pursuit of knowledge about the performance of agricultural tractors on the market and make the appropriate selection of attachments for each tractor, the research has presented mathematical models as an important tool ...
FUNÇÕES DE PRODUÇÃO DAS CULTURAS DE MILHO E FEIJÃO ATRAVÉS DE ESTUDO EXPERIMENTAL E SIMULADO
(Universidade Federal de Santa Maria, 2010-01-28)
The development of math models can available a tool to estimate and understand the behavior of the system in face of diferent situations, helping in the decision-making process, through a simplified representation of ...
SIMULAÇÃO DE CENÁRIOS DE SUSTENTABILIDADE HÍDRICA DA ORIZICULTURA NA SUB-BACIA HIDROGRÁFICA DO ARROIO GRANDE ATRAVÉS DA IMPLANTAÇÃO DE BARRAGENS TEMPORÁRIAS
(Universidade Federal de Santa Maria, 2010-09-03)
Water shortages in certain periods have led to serious social conflicts, as well as economic and environmental impacts resulting from irrigated agriculture, especially of rice growing, which represents a high demand of ...
PROTEÇÃO DE GOTEJADORES A OBSTRUÇÃO POR INTRUSÃO RADICULAR EM IRRIGAÇÃO SUBSUPERFICIAL DE FIGUEIRAS
(Universidade Federal de Santa Maria, 2010-05-28)
An experiment of surface and subsurface drip irrigation in figs was held in Santa Maria, Rio Grande do Sul state, with aim of evaluate the disposables materials efficiency for protecting water emitters in subsuperface ...
PREVISÃO DA OCORRÊNCIA DE REQUEIMA E ALTERNARIA EM TOMATEIRO INDUSTRIAL IRRIGADO SOB DUAS CONDIÇÕES CLIMÁTICAS E SEU CUSTO
(Universidade Federal de Santa Maria, 2010-02-22)
The tomato (Lycopersicon esculentum Mill) is an important crop in the world and an important product for trade "in nature and for industry. The amount of fungicides used in
tomato crop for control of diseases is high and ...
Aperfeiçoamento de um mecanismo sulcador para plantio direto de mandioca
(Universidade Federal de Santa Maria, 2010-10-23)
In the cassava production the conventional tillage, characterized by soil preparation with intensive mobilization, is commonly used. However, when this practice results in the maintenance of small quantities of straw on ...
Estudo teórico de nanofitas de grafeno dopadas com Ni e Mn
(Universidade Federal de Santa Maria, 2010-07-16)
In this work we present the results of a systematic study of the stability, and the electronic, stuctural and magnetic properties of graphene nanoribbons doped with Ni (Ni/GNR) and Mn (Mn/GNR), through ab initio density ...
Espectroscopia de Impedância Elétrica do VO2
(Universidade Federal de Santa Maria, 2010-01-18)
Impedance Spectroscopy has been performed at the metal-semiconductor transition of vanadium dioxide thin films. The samples have been deposited by reactive magnetron sputtering onto heated glass substrates. The crystallographic ...
Relaxação de spin: principais mecanismos em microfios e em filmes multicamadas
(Universidade Federal de Santa Maria, 2010-07-16)
This work is dedicated to investigate the spin relaxation in amorphous CoFeSiB glass-covered microwires and multilayered films of Permalloy/Cu. The microwires samples were Joule annealed and axially stressed in order to ...