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Evaluación del efecto de dosis crecientes de nitrato sobre la actividad de la reductasa del nitrato; nitrógeno derivado del fertilizante en cafeto
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1980-01)
Defficient Coffea arabica L. plants were treated with CaNO, (114%15N) in doses ranging from 25 to 200 kg/ha of N The effect of the treatments on the activity of nitrate reductase and on Nitrate Assimilation Potential was ...
Temperatura do ar em cafezal
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1980-01)
This paper studies the thermal 1egime of añ inside an unshaded conventional coffee crop.
Measmements were made al five levels corresponding lo 20, 40, 60, 80 and 100 per cent of mean crop height.
Air temperature inside ...
Liberación de protoplastos, reconstitución de la pared celular, proliferación del callo en tejidos de callo de Coffea arabica L.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1980-04)
Uma metodologia para liberação e cultura de protoplastos de tecidos de café foi definida a fin de permitir a possibilidade de manipulação genética dentro do genero Coffea. Uma combinação de 2,5% Pectinase, 3,5 por cento, ...
Effect of infesting green coffee berries with different population levels of Antestiopsis lineaticollis Stal (Heteroptera: pentatomidae) in Kenya
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1980-01)
Al poner en jaulas machos y hembras de Antestiopsis lineaticollis en poblaciones de 0, 2, 4, 6 y 8 por jaula sobre frutos de café resultó en una caída de cerezas de 7 a 35 por ciento en las diferentes poblaciones. Los ...
Molhamento foliar em cafezal recepado e decotado
(1980-01)
This paper reports on the study of the beginning termination and duration of the active period of leaf wetness in the coffee. Surface wetness was observed in two plots a vranged in a north-south orientation, on the sides ...
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, ...
Determinación cuantitativa de la floración en café Coffea arabica L
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1980-04)
A quantitative method is described for determining flowering in coffee. The size of each bloom is estimated visually with the aid of the following scale: 1-25%, 2-50%, 3-75% and 4-100% after a general survey of the planiation. ...
Variación estacional de la reductasa de nitrato en el cafeto
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1980-07)
The sesonal trends of nitrate reductase activily, of NO-3 induced activity of the same enzyme, and of the quotient between them, aRNi/aRNb, known as Nitrate Assimiletion Potential, were investigated. Assays were carried ...
Formacao de ácidos orgánicos, acúcares e lipídeos a partir de acetato C em folhas de cafeeiro
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1980-07)
The acetate 14C metabolism was studied in detached coffee leaves (Coffea arabica L. cv. 'Mundo Novo'). The leaves were incubated in 10 pCi of acetato-1-C and 10 uCi of acetato-12-25C out of Inminosity Incubation was ...