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Variabilidade espacial de atributos físicos do solo e características agronômic...
Carvalho, Luis Carlos Cirilo; Da Silva, Fábio Moreira; Ferraz, Gabriel Araújo e Silva; da Silva, Flávio Castro; Stracieri, Juliana [UNESP]Made available in DSpace on 2022-04-29T07:13:29Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-12-01; Precision agriculture differs from the conventional by uniting spatial relationships to the variability in the field, becoming an important management tool of the agricultural systems. Thus, the present study aimed to evaluate, by classical statistics, geoestatistics and principles of precision agricult...
PRODUÇÃO DE BIODIESEL POR ROTA ETÍLICA E METÍLICA A PARTIR DE PLANEJAMENTO FATO...
Lopes, Laurênio Ferreira; da Silva, Flávio Castro; Simões, Rita Colman; Pontual, Leandro Vahia; de Souza, Luan Alves; do Nascimento, Leomário GuedesA análise realizada nesta pesquisa teve como objetivo o desenvolvimento deum processo para a produção de biodiesel em escala de bancada. A reaçãofoi realizada pelo método de transesterificação alcalina, em que os reagentesforam submetidos à temperatura de 60 ± 2ºC mantendo constante agitaçãomecânica. Por meio de um planejamento experimental fatorial, avaliaramseos níveis máximos e mínimos de três variáveis: cat...
Meteorological variables and soil moisture in the detachment force coffee fruit
da Silva, Flávio Castro; da Silva, Fábio Moreira; Sales, Ronan Souza; Ferraz, Gabriel Araújo e Silva; de Barros, Murilo MachadoThis study aimed to identify whether climatic and soil moisture variables are related with the variation of detachment force coffee fruits (Coffea arabica L.) during the crop harvest period. The research was carried out at Departamento de Agricultura at Universidade Federal de Lavras (UFLA) trying to analyze the behavior of detachment force coffee fruits in green and cherry maturation throughout the crop harves...
Correlation detachment coffee force fruit under different conditions nutrition
da Silva, Flávio Castro; da Silva, Fábio Moreira; Scalco, Myriane Stella; Sales, Ronan SouzaThe coffee yield is strongly influenced by adequate supply of water and nutrients to plants. Because not all soil is the ideal amount of nutrients for plant growth, fertilization is intended to supplement these nutrients. The nole of fertigation is to provide coffee the water volume to be supplied with nutrients and preventing entering the plant water stress and nutrition. This study was carried out in the expe...
Efficiency Efficiency of coffee mechanical and selective harvesting in differen...
da Silva, Flávio Castro; da Silva, Fábio Moreira; Alves, Marcelo de Carvalho; e Silva Ferraz, Gabriel Araújo; Sales, Ronan SouzaThe aim of the present work was to assess the operating performance of mechanical harvesting of the fruit of coffee trees (Coffea arabica L.) with a KTR® Advance harvester using a “neuro-fuzzy” system which considered the variation of the vibration of the rods and the maturation index of the fruit. The evaluations were carried out fortnightly for 70 days in treatments with vibration levels of 13.33, 15.00 and 1...
Operacional performance of mechanically harvested coffee and selectivity in acc...
da Silva, Flávio Castro; da Silva, Fábio Moreira; da Silva, Antônio Carlos; de Barros, Murilo Machado; Zambillo Palma, Marcos AntônioIn mechanized harvesting, one of the difficulties encountered by farmers is to determine the appropriate time to start harvesting, as well as vibration and determine the most appropriate operating speed for each cultivar during the harvest period. In general, the regulation of vibration and operating speed of the harvester has been made by producers in an empirical way, by trial, seeking greater operational per...