Encontrados 12 documentos, a visualizar página 1 de 2
Characterization of the coffee fruit detachment force in crop subjected to mech...
Ferreira Júnior, Luiz de Gonzaga; Silva, Fábio Moreira da; Ferreira, Danton Diego; Simão, Sérgio Domingos; Souza, Gabrielly Carvalho deIn order to adjust the coffee harvester and to assist in deciding either whether or not to make a second pass of the harvester, fully or selectively, it is necessary to know some crop parameters. The aim of the present study was to evaluate the coffee fruit detachment force in the green and cherry ripeness, under different plant positions and in four evaluation periods, throughout the harvest period between the...
Comparison between the soil chemical atributes sampled conventionaly and in grid
Ferraz, Gabriel Araújo e Silva; Silva, Fábio Moreira da; Oliveira, Marcelo Silva de; Silva, Flávio Castro da; Carvalho, Luis Carlos CiriloThe aim in this article was to characterize the structure and magnitude of the spatial distribution of soil attributes on a coffee field and map these attributes in order to identify the spatial dependence of them. It was aimed to compare the attribute amount when it was sampled conventionally or in grid sampling. This study was carried out on the Brejão farm in Três Pontas, Minas Gerais state, Brazil. As a dat...
Comparison of sampling leaf conventional and precision for micronutrients analy...
Carvalho, Luis Carlos Cirilo; Silva, Fábio Moreira da; Ferraz, Gabriel Araújo e Silva; Figueiredo, Vanessa Castro; Cunha, João Paulo BarretoOne of the technologies that has been outstanding for the management of crops is the precision of coffee growing. However, there are still many fears on the part of growers in their adoption due to the lack of information to justify its use, compared to the current conventional management. This study aimed to evaluate the spatial and temporal variability of micronutrients (Zn, Fe, Mn, Cu and B) obtained through...
Doses of noise to whom are subject operators portable harvester coffee
Sales, Ronan Souza; Silva, Fábio Moreira da; Silva, Flávio Castro daThe harvest of coffee (Coffea arabica L.) is a costly process that demands high cost labor , increasingly scarce and the mechanization process a way for the farmer to remain in the activity . The objective of this study was to analyze the noise dose to which they are exposed operators portable harvester. The experiment was carried out in a coffee plantation of Catuaí Amarelo 62. For the experiment we used two p...
Variabilidade espacial de atributos químicos e de produtividade na cultura do café
Silva, Fábio Moreira da; Souza, Zigomar Menezes de; Figueiredo, Carlos Augusto Pereira de; Marques Júnior, José [UNESP]; Machado, Rodrigo VillelaSubmitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:59:49Z No. of bitstreams: 1 S0103-84782007000200016.pdf: 2460154 bytes, checksum: dfd96217c2663c38ecbd4ac4e4b8586f (MD5); Made available in DSpace on 2013-08-22T18:59:49Z (GMT). No. of bitstreams: 1 S0103-84782007000200016.pdf: 2460154 bytes, checksum: dfd96217c2663c38ecbd4ac4e4b8586f (MD5) Previous issue date: 2007-04-01; Made availa...
Spatial variability of soil physical attributes and agronomic characteristics o...
Carvalho, Luis Carlos Cirilo; Silva, Fábio Moreira da; Ferraz, Gabriel Araújo e Silva; Silva, Flávio Castro da; Stracieri, JulianaPrecision 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 agriculture, some physical attributes indicative of soil compaction, such as bulk density, soil penetration resistance...
Influence of the use of biosynthesis inhibitor ethylene on the efficiency of co...
Dias, Rodrigo Elias Batista Almeida; Silva, Fábio Moreira da; Cunha, João Paulo Barreto; Avelar, Rogner Carvalho; Fernandes, Fernando CostaThe mechanized harvesting is evolving daily and has become an increasing and irreversible process. However, one of the limitations of the harvest, either manual or mechanized, is the uneven ripening, which affects the operating performance and the product quality, resulting economic losses to producers. Thus, this study was carried out with the objective of evaluating the operation of the mechanized coffee harv...
Precision agriculture to study soil chemical properties and the yield of a coff...
Ferraz, Gabriel Araújo e Silva; Silva, Fábio Moreira da; Costa, Pedro Augusto Negrini da; Silva, Antônio Carlos; Carvalho, Francisval de MeloPrecision agriculture appears as an important tool in the management of coffee farms where the knowledge of some soil fertility characteristics associated with the coffee production could help in specific application of fertilizers with positive environmental and economic results. So the aim of this article was to use precision agriculture and geoestatistics to evaluate the availability of phosphorus, potassium...
Use of ethrel on the mechanized and selective coffee (Coffea arabica L.) harvest
Silva, Fábio Moreira da; Arré, Tadeu Jorge; Tourino, Ely de Souza; Gomes, Túlio Seabra; Alves, Marcelo de CarvalhoEthrel is a physiological maturation accelerator, which has been applied to coffee crops through wet solution for fruit maturation standardization, acting as an accelerator, anticipating and increasing the efficiency of the coffee harvest. This work was conducted at Palmito farm, located in Boa Esperança city, south of Minas Gerais, on the Mundo Novo cultivar. The application of Ethrel was conducted in 30 plant...
Bioleaching of metals from tannery sludge in two stages: effect of pH - DOI: 10...
Silva, Fábio Moreira da; Ramos, Fabrícia Maribondo da Silva; Costa, Antonio Carlos Augusto da; Tavares, Célia Regina GranhenThe present work assessed the effect of the pH in the bioleaching of Cr and other metals from tannery sludge with stage separation of biologic oxidation of elemental sulfur and leaching of solid waste. The concentration of elemental sulfur was 5 g L-1. The final bioleaching pH ranged from 3.0 to 1.0. The concentration of sludge solids was 100 g L-1 and the temperatures were 298.15 and 308.15 K. The leaching ext...