Currently, the efficiency in field operations and the increased productivity of crops is only possible with the use of agricultural machinery and equipment. This intensification of mechanized activities in agriculture, however, led to higher energy costs on farms mainly in the fuel consumption of agricultural tractors. The objective was to compare the fuel consumption of a tractor on tillage operations for irrigated cotton in semi-arid region varying two tire inflation pressures. The tests were conducted in Maricopa Agricultural Center (MAC), an experimental farm belonging to The University of Arizona using a 4x2 TDA Case tractor equipped with a 88kw autopilot system. The results showed lower values in the hourly fuel consumption by using the minimum tire inflation pressure of 124 kPa for all tillage equipment used.
Agricultural mechanization improved the efficiency of field operations by providing an increase in crop production. The intensified mechanization, however, has led to higher energy use mainly in the area of fuel consumption. The objective of this study was to compare the fuel consumption of tractors using two different tire pressures for two different types of soil during tillage with irrigated cotton in semiarid regions. These tests were performed at the Maricopa Agricultural Center (MAC), an experimental farm belonging to The University of Arizona with a Case 4x2 TDA 88kW equipped with an autopilot system. The results showed lower fuel consumption using a tire pressure of 124 kPa on sandy clay loan soil.
RESUMO: Muitas operações agrícolas realizadas nas propriedades rurais apresentam algum tipo de atividade mecanizada em busca de melhores resultados de eficiência operacional e retorno econômico ao produtor rural. Essa intensificação de processos mecanizados no campo deve ser corretamente dimensionada, relacionando de forma eficiente o conjunto trator, ferramenta e solo. Este trabalho teve como objetivo instrumentar e avaliar um equipamento escarificador na mobilização do solo variando-se os tipos de haste e as profundidades de trabalho. Os ensaios foram realizados na Tokyo University of Agriculture and Tecnology na cidade de Tóquio, Japão. Foi utilizado um trator agrícola da marca ISEKI com 17,8 kW de potência no motor instrumentado com sistema de navegação por satélite (GNSS), sistemas eletrônicos de coleta de dados e extensômetros elétricos de resistência. O delineamento experimental utilizado foi o de blocos inteiramente casualizados com um arranjo fatorial 2 x 3, com 3 repetições. Foram realizados ensaios com dois diferentes tipos de haste (com defletor metálico, e com defletor plástico) para três profundidades de trabalho (15, 25 e 35 cm). Realizou-se o teste estatístico com a análise de variância pelo teste F comparando-se as médias pelo teste Tukey a 5% de probabilidade quando necessário. Os resultados obtidos não apresentaram diferenças significativas nas forças de mobilização do solo utilizando o equipamento escarificador entre os diferentes tipos de defletores na haste para todas as profundidades de trabalho.
The mobile technology became an important tool for nowadays society, allowing fast and easy access to information, becoming useful on both the user's professional and personal life. However, the mobile environment involves many technologies, turning into a complex subject for software development, where it's necessary to pay attention to many variables in order to ensure the project's quality. Therefore, the present study was conducted with a mobile software development company, analyzing and contributing to the company's activity in order to identify common problems related to an application management and development. It was found issues related to the software interface and quality control processes, also covering the migration from a local database to a cloud service.
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