Boron Doses Applied To Soil During Coffee Development

The range between boron deficiency and toxicity in the coffee crop is narrow and the crop toxicity tolerance depends on the soil type, initial soil content and plant age. The objective of this study was to evaluate different levels of boron in the coffee crop during development and grown in a red clayey Oxisol. Treatments consisted of boron applications (zero; 2.48; 4.96; 9.92; 19.8 and 39.68 kg ha-1) in the boric acid form and applied to soil surface in the area of the tree crown projection. The six treatments were outlined in a randomized block design with four replications and ten plants per plot. The cultivar used was Catuaí IAC 144 with sixteen months old, grown in an Oxisol in Campinas, SP, Brazil. Foliar boron content was analyzed as a function of time by regression analysis. The levels in fruit and yield were analyzed by regression according to boron doses. It can be concluded that higher boron doses in the plant can be observed when fruits are at the first development stage. High doses can reduce yield productivity, being each kilogram of applied boron responsible for a reduction of 0.33 coffee bags. ha-1.71495

Viabilidade Técnica E Econômica Da Irrigação Localizada Do Cafeeiro, Nas Condições Climáticas Do Planalto De Araxá, Mg

In the region of Araxá highlands, the economical production of coffee is traditionally made without irrigation. Notwithstanding in recent years, with climate change, water deficit of 150 mm have been verified, affecting the vegetative and productive development of the culture. Within this context, the aim of this study was to evaluate supplementary irrigation to increase production and profitability of the coffee grown in the highlands of Araxá, compared to a non-irrigated and irrigated cultivation throughout the year. The work was implemented in Araxá, Minas Gerais in 2006 and carried out throughout the period of nine years. Different periods of water stress (from April to November) were evaluated, compared with irrigation throughout the year and the witness. After 6 consecutive harvests, it can be concluded that supplemental irrigation promoted an increased productivity in the coffee grown under the conditions of the Araxá Plateau, especially in years of drought. With regard to economic performance, the process of irrigation applied throughout the year promoted profits of 279% (R$/ha year-1) compared to the treatment without irrigation. © 2016, Editora UFLA. All rights reserved.11334735

Uso De Extensores Flexíveis Na Derriça Em Lavouras De Café De Primeira Safra

The coffee harvest of the first crop can be benefited by the use of rubber extenders at the end of the stems. This because their malleable constitution acquires oscillatory motion increasing the stem contact area with the fruits. However, the coffee varieties have big morphological and physiological differences that can influence the mechanical harvesting. This study had a goal to test two of coffee harvesters (conventional and adapted to the harvest of the first crop plantations) in the absence and presence of rubber extenders in two cultivars (Catuaí Vermelho IAC 144 and Tupi IAC 1669-33). The design was randomized blocks in five plants per plot. Evaluated the amount of fallen coffee, remaining harvested, picked and operational defoliation. Evaluated the amount of fallen coffee, remaining harvested and operational defoliation. There was obtained that the use of rubber extenders increases the amount of coffee collected in 16.6%. The first crop coffee harvest should be made with harvester adapted to this situation. The Cultivar Tupi IAC 1669-33 has high difficulty to be mechanically harvested the first crop, should be taken with two mechanized operations. © 2016, Editora UFLA. All rights reserved.11218719

Catálogo de cultivares de café arábica.

Esta publicação tem por objetivo disponibilizar e sistematizar, de forma sucinta, as principais características agronômicas e tecnológicas de cultivares de café arábica, a fim de auxiliar os produtores dos Cafés do Brasil na escolha do material genético que melhor atenda às suas necessidades técnicas e econômicas. São destacadas as principais características de 90 cultivares de Coffea arabica, as quais foram fruto do trabalho colaborativo de programas de pesquisa de instituições fundadoras e parceiras do Consórcio Brasileiro de Pesquisa e Desenvolvimento do Café, rede integrada de pesquisa constituída em 1997, formada por mais de 40 instituições de ensino, pesquisa e extensão rural, coordenada pela Embrapa Café

Prototipo funcional de un sistema de clasificación para las cerezas de café castillo, en función de su etapa de maduración

Trabajo de InvestigaciónEn el siguiente proyecto de grado se desarrolla un prototipo funcional para la clasificación automatizada de café castillo en función de su etapa de maduración, el cual consta de un sensor de color RGB, una banda transportadora, un servomotor para el desvió de las cerezas de café y el microcontrolador atmega328p. Inicialmente se realiza una búsqueda de las tecnologías que se emplean para este proceso, posterior a esto se selecciona los dispositivos que se usaran, ya con esto, se hace el modelado 3D del prototipo en el software Autodesk Inventor, se simula el sistema en Proteus y se diseña el circuito impreso (PCB) en EasyEDA, después de esto se realiza la implementación del prototipo para finalmente hacer las pruebas de validación.INTRODUCCIÓN 1. GENERALIDADES 2. METODOLOGÍA 3. DESCRIPCIÓN ECONÓMICA DEL PROYECTO 4. CONCLUSIONES 5. RECOMENDACIONES Y TRABAJOS FUTUROS BIBLIOGRAFÍA ANEXOSPregradoIngeniero Electrónic