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A method for differentiating between Coffea arabica and C. canephora plants and their hybrids
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1972-07-01)Coffea canephora (Robusta) is diploid (2n=22) and C. arabica is tetraploid (2n=44). Both species are highly polymorphic and some of their forms overlap, making it impossible to always differentiate them on the basis of ... -
Absortion and translocation of arsenate by coffee plants
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1964-04-01)Se hicieron estudios de absorción y trasla ción del arseniato en plantas de café usando arsénico-77, el cual fue aplicado a las hojas y a las raíces, en este caso a través de la solución nutritiva Las hojas más jó venes ... -
Actividad enzimática de la polifenasa, peroxidasa y catalasa en granos de Coffea arabica L. y relaciones con la calidad de la bebida
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1977-01) -
Aerial spraying with zinc sulfate on coffee trees in the state of Sao Paulo, Brazil
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1968-04-01)Foram realizadas aplicaçoes de sulfato de zinco em cafeeiros de 1 1/2 anos de idade. Várias misturas foram testadas, Ca(OH)2, NaOH e espalhante-adesivo, combinadas em várias concentraçoes de sulfato de zinco. Foi observado ... -
Aireación en un suelo de café
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1966-10)This work constitutes a study on drainage and aeration made within a selected area comprising part of the IICA coffee collection area with a variable topography. The area (about 0.5 acre) was divided into four sites ... -
Algunas características de importancia para la separación de los cultivares en Coffea arabica L
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1973-10)The following characteristics of Coffea arabica L. showed certain differential value for the standarization of cultivars in this species: 1. leaf length, 2. leaf width, 3. leaf length/leaf width, 4. angle of insertion of ... -
Algunas observaciones sobre la prueba de tetrazolio en semilla de café (Coffea arabica y C. canephora)
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1980-04)En semillas de café hay correlación entre la prueba de germinación y los resultados de la prueba de tetrazolio (TTZ), si los lotes tienen alta viabilidad. En el rango de 30 a 70 por ciento aproximadamente de germinación, ... -
An abnormality in the growth of the endosperm of Coffea arabica L.
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1963-10)A sample of six agricultural agents in Venezuela to determine their use of time. An observation guide allowed checking several topics every five minutes and a questionnaire was used to determine the opinions of effective ... -
Aplicación de soluciones de azúcar en aspersiones foliares, para prevenir la caída prematura del grano verde del café
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1962-04)Preliminary results of spraying coffee plants soon after flowering with 10 sucrose solutions, show that there is a reduction of fruit shedding in trees under treatment. Applications were made at four, six and eight weeks ... -
La aplicación del diagnóstico foliar en el cafeto (Coffea arabica L.) para una mejor fertilización
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1959-10)Como es frecuente que las diferencias en el contenido mineral entre árboles normales y árboles con deficiencias no sean muy notorias, excepto en el caso del potasio, parece conveniente el análisis diferencial (comparación ... -
Bee pollination affects coffee quality, yield, and trade-offs within them
(2025-01-01)Bees provide valuable pollination services by increasing crop yields. However, pollination services to crop quality – which often determines nutritional and financial value – have been less studied, particularly in tropical ... -
Blister spot of Arabica coffee from virus in Costa Rica
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1957-01-01)Una enfermedad virosa del café avabica fue estudiada en Costa Rica. Los tra-bajos de laboratorio e invernadero se llevaron a cabo en el Instituto Interamericanо de Ciencias Agrícolas, en Turrialba, Costa Rica, en tanto que ... -
La chasparria de los cafetos causada por el hongo Cercospora coffeicola Berk. & Cooke
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1959-04)Se observó una gran variación en el tamaño de las fructificaciones de Cercospora coffeicola Berk. & Cooke, así como en la forma y el tamaño de las lesiones producidas por este organismo. El hongo esporuló abundantemente ... -
Chemistry of brazilian green coffee and the quality of beverage, 4: Electrophoresis of proteins in agar-gel and its interaction with chlorogenic acids
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-01-01)Amostras de Coffea arabica "Mundo novo" coletada no Estado de Sao Paulo e Minas Gerais (Brasil) e classificadas quanto {hooka} qualidade da bebida, foram analisadas quanto ao comportamento eletroforético de suas proteínas ... -
Chemistry of brazilian green coffee and the quality of the beverage, 1: Carbohydrates
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1974-04-01)Vinte e quatro amostras de café beneficiado foram classificadas quanto a qualidade da bebida (Mole, Dura, Riada e Rio) e analisadas para carbohidratos totais solúveis em etanol, açúcares redutores e polissacarídeos solúveis ... -
Chemistry of brazilian green coffee and the quality of the beverage, 2: Phenolic compounds
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-04-01)Vinte e quatro amostras de café beneficiado sendo que 6 qualidade Mole, 6 Dura, 6 Riada e 6 Rio foram analisadas para ácido clorogenico total e seus isomeros, fenóis totais em água e metanol e fenóis hidrolizáveis. O teor ... -
Chemistry of Brazilian green coffee and the quality of the beverage, 5: Multiple linear regression analysis
Multiple linear regression analysis was performed to try to relate the quality of the coffee beverage to its chemical composition. Six samples of each beverage quality (Soft, Hard, Riada and Rio) were classified by ... -
Chemistry of Brazilian green coffee and the quality of the beverage. III. Soluble proteins
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1974-07)Amostras de café arábica beneficiado (var. ´ Mundo Novo´) colhidas no mesmo ano em diferentes regiões do Estado de São Paulo e Minas Gerais, Brasil, foram classificadas quanto à qualidade da bebida por provadores profissionais ... -
Chemistry of Brazilian green coffee and the quality of the beverage. VI. UV. and visible spectral analysis and chlorogenic acids content on TCA soluble buffer extracts
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1975-07)Amostras de café previamente classificadas quanto à qua´idade da bebida, Mole e Rio, foram moidas e extraidas com diversas soluções aquosas. Depois de precipitadas as proteínas com T.C.A., o sobrenadante dos cafés Mole ... -
Chlorogenic acid content in species of coffea and selections of C. arabica
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1974-10-01)The total content of chlorohydrogenic acid in green beans of the following coffee species was studied: Coffea salvatrix, C. canephora, C. liberica, C. dewevrei, C. racemosa, C. eugenioides, C. kapakata, C. stenophylla and ...
