Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Rubens D Coelho"'
Autor:
Jéfferson de O. Costa, Rubens D. Coelho, Timóteo H. da S. Barros, Eusímio F. Fraga Júnior, André L. T. Fernandes
Publikováno v:
Engenharia Agrícola, Vol 38, Iss 5, Pp 648-656 (2018)
ABSTRACT The plant water potential and the leaf temperature are physiological responses of the coffee tree that can be used as indicative of the irrigation management of this crop. There is a dependence between the leaf water potential with the poten
Externí odkaz:
https://doaj.org/article/05a526b97daf4c66a56f72f7e281eaea
METHODOLOGY FOR DIMENSIONING OF A CENTER PIVOT IRRIGATION SYSTEM OPERATING WITH DRIPPER TYPE EMITTER
Publikováno v:
Engenharia Agrícola, Vol 37, Iss 4, Pp 828-837 (2017)
ABSTRACT: In Brazil, the conventional center pivot is widely used for irrigation of agricultural crops and its use has grown continuously. However, when improperly managed, it facilitates the development of diseases in all parts of the plant, with a
Externí odkaz:
https://doaj.org/article/21c445783fa7476fae3af63bf14861ca
Autor:
Robson Mauri, Rubens D. Coelho, Eusímio F. Fraga Junior, Fernando Da S. Barbosa, Daniel P. V. Leal
Publikováno v:
Engenharia Agrícola, Vol 37, Iss 2, Pp 268-276 (2017)
ABSTRACT This study aimed to quantify water deficit levels that compromise sugarcane initial growth exposed to different availability soil depths. The experiment was conducted in a greenhouse by using 100-liter capacity asbestos-cement boxes filled w
Externí odkaz:
https://doaj.org/article/c5b5ed12847142adb1bf6a3f98814b33
Autor:
ALEX N. DE ALMEIDA, RUBENS D. COELHO, ASDRÚBAL J. FARÍAS, RODRIGO O. C. MONTEIRO, JÉFFERSON DE O. COSTA
Publikováno v:
Engenharia Agrícola, Vol 36, Iss 5, Pp 902-916 (2016)
ABSTRACT The tariff flags on Brazil came into force in January 2015, applied to all electrical distribution agents of the national interconnected system (SIN) and all final consumers are being charged for this new model. Given this, the cost of elect
Externí odkaz:
https://doaj.org/article/1bebdeb9d5c9481398c49643d606b613
Publikováno v:
Engenharia Agrícola, Vol 35, Iss 3, Pp 419-429 (2015)
Este trabalho foi desenvolvido com o objetivo de determinar, em condições laboratoriais, o coeficiente de descarga (Cd) dos emissores fixos tipo “spray” (Senninger, Nelson e Fabrimar) utilizados em equipamentos pivô central no Brasil. Foram av
Externí odkaz:
https://doaj.org/article/692a3fd0004b475b954fc27d4aa8bdbb
Autor:
Fernando da S. Barbosa, Rubens D. Coelho, Rafael Maschio, Carlos J. G. de S. Lima, Everaldo M. da Silva
Publikováno v:
Engenharia Agrícola, Vol 34, Iss 2, Pp 203-210 (2014)
Soil water availability is the main cause of reduced productivity, and the early development period most sensitive to water deficit. This study aimed to evaluate the drought resistance of the varieties of sugar-cane RB867515 and SP81-3250 during the
Externí odkaz:
https://doaj.org/article/581a82162ab24f4c98b013b11d0916e3
Publikováno v:
Engenharia Agrícola, Vol 32, Iss 4, Pp 774-783 (2012)
In this study is presented an economic optimization method to design telescope irrigation laterals (multidiameter) with regular spaced outlets. The proposed analytical hydraulic solution was validated by means of a pipeline composed of three differen
Externí odkaz:
https://doaj.org/article/1b2776d66c9b45afac3d9e76def8b99a
Publikováno v:
Engenharia Agrícola, Vol 32, Iss 3, Pp 479-489 (2012)
This study aimed to evaluate the spatial variability of leaf content of macro and micronutrients. The citrus plants orchard with 5 years of age, planted at regular intervals of 8 x 7 m, was managed under drip irrigation. Leaf samples were collected f
Externí odkaz:
https://doaj.org/article/0d1001e40a4f4b0e8a44989b8af5e99d
Publikováno v:
Engenharia Agrícola, Vol 32, Iss 3, Pp 602-608 (2012)
Although several studies have been conducted to evaluate the uniformity of water application under center pivot irrigation systems, there are few studies concerning the economic perspective of such coefficient. The aim of this study is to present a m
Externí odkaz:
https://doaj.org/article/94c847819b0a42c9a17287f6a03ed7be
Publikováno v:
Engenharia Agrícola, Vol 32, Iss 3, Pp 573-581 (2012)
Most studies on measures of transpiration of plants, especially woody fruit, relies on methods of heat supply in the trunk. This study aimed to calibrate the Thermal Dissipation Probe Method (TDP) to estimate the transpiration, study the effects of n
Externí odkaz:
https://doaj.org/article/f28bc78bf05f4a5e8f1337cbbe1a3367