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

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