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PARAMETERS OF OPERATIONAL PERFORMANCE OF SOIL PREPARATION AND SEMI-MECHANIZED TRANSPLANTATION OF COFFEE SEEDLING REA
Cunha,João P. B.; Silva,Fabio M. da; Andrade,Ednilton T.; Barros,Murilo M. de.
ABSTRACT In recent years, the coffee has undergone major changes, and in case of transplanting operation, the use of machinery has proved to be a viable alternative to producers. Prior knowledge of the influence of the variables that influence the operational capability of these machines can generate models to estimate precisely these parameters, thus enabling the optimization and management of mechanized operations. One of this tool is the use of the response surface methodology, which allows checking the influence of different independent variables and the response generated to allow a great value. This study aims to verify the use of the response surface method to determine parameters of mechanized operations in coffee plant implantation. The results...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mechanization; Planting seedlings; Coffea Arabica.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000600910
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INFLUENCE OF DIFFERENT TEMPERATURES AND AIRFLOWS ON DRYING OF NATURAL AND PULPED COFFEE REA
Alves,Guilherme E.; Borém,Flávio M.; Andrade,Ednilton T.; Isquierdo,Éder P.; Siqueira,Valdiney C.; Dias,Camila de A..
ABSTRACT This study aimed to evaluate drying kinetics for natural and pulped coffee, using different temperatures and drying airflows. For the conduction of the experiment, coffee fruits (Coffea arabica L. cv. Topázio) were harvested manually, selecting only ripe fruits and subsequent to the hydraulic separation. For drying the coffee, use a mechanical dryer with two temperatures (40 and 45°C) and four drying air streams (24; 60; 96 and 132 m3.min-1.m-2). Twelve models for employees to describe the drying kinetics of coffees. Among the models used to describe the drying process of natural coffee and pulped coffee, according to the results of the coefficient of determination, relative mean error, standard deviation of estimates and distribution of waste...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffea arabica L.; Mathematical modeling; Drying rate.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000200192
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Determination of the hygroscopic equilibrium and isosteric heat of aji chili pepper AGRIAMBI
Andrade,Ednilton T.; Figueira,Vitor G.; Teixeira,Luciana P.; Taveira,José H. da S.; Borém,Flávio M..
ABSTRACT This study focuses on the determination of the hygroscopic equilibrium and isosteric heat of the aji chili pepper (Capsicum baccatum) under different controlled temperature and relative air humidity conditions. In addition, the objective was to adjust the model among the existing literature models that best represent the isothermal sorption behavior, as well as propose a new model to represent this phenomenon. Having obtained the mathematical models and experimental data, the best model and parameters that represent the hygroscopicity and the isosteric heat satisfactorily was determined. The temperatures used were 30, 55, and 70 °C, with water activity levels from 0.11 to 0.84. The model that best fit the data had a R2 value of 0.97. The integral...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Capsicum baccatum; Sorption isoterms; Thermal property.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017001200865
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Utilization of bedded cattle confinement for organic manure of maize crop AGRIAMBI
Mota,Vania C.; Andrade,Ednilton T.; Pinto,Sandra M.; Abreu,Luiz R. de; Leite,Daniel F..
ABSTRACT The use of organic wastes from housing systems in a compost bedded pack barn model could supply much of the fertiliser demand in the farm. Moreover, with the increase in food consumption from sustainable livestock, the use of compost generated in the farm itself becomes economically viable. This study aimed to evaluate the effect of organic manure from bedded cattle confinement applied at different moments on maize crop. The experiment was carried out in a randomized blocks with five treatments and five repetitions. The data were submitted to analysis of variance and the means were compared by Scott-Knott test at p ≤ 0.05. The treatments with addition of fresh compost and mature compost with nitrogen cover had higher production of maize shoot dry...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays L.; Dairy cattle; Sustainable livestock; Compost Barn.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000800620
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