The relation between foreign exchange and banking crises in emerging countries: information and expectations problems

Includes bibliography

The competitive real exchange-rate regime, inflation and monetary policy

Includes bibliography

Exchange-rate management in Brazil

Includes bibliography

The "China effect" on commodity prices and Latin American export earnings

Includes bibliography

Latin America: variability and persistence in commodity prices

Includes bibliography

Macroeconomy for development: countercyclical policies and production sector transformation

Includes bibliography

Latin American commodity exports: the case of cotton fibre

Includes bibliography

Study on commodity trade: draft resolution approved by Committee I on 25 May 1957

Includes bibliography

Resolución 7: Arreglos Intergubernamentales sobre productos primarios = Resolution 7: Inter-governmental commodity agreements = Résolution 7: Accords intergouvernementaux sur les produits de base

El símbolo E/840/Rev.1 corresponde a la edición bilingüe inglés/francés publicada en 1953

Effects of soil and foliar application of soluble silicon on mineral nutrition, gas exchange, and growth of potato plants

Silicon can alleviate biotic and abiotic stresses in several crops, and it has beneficial effects on plants under nonstressed conditions. However, there is still doubt about foliar-applied Si efficiency and Si effects on mineral nutrition, physiological processes, and growth of potato (Solanum tuberosum L.) plants under wellwatered conditions. The objective of this study was to evaluate the effect of soil and foliar application of soluble Si on Si accumulation, nutrients, and pigments concentration as well as gas exchange and growth of potato plants. The experiment was conducted under greenhouse conditions in pots containing 35 dm3 of a Typic Acrortox soil. The treatments consisted of a control (no Si application), soil application of soluble Si (50 mg dm-3 Si), and foliar application of soluble Si (three sprays of 1.425 mM Si water solution, prepared with a soluble concentrate stabilized silicic acid), with eight replications. Both soil and foliar application of Si resulted in higher Si accumulation in the whole plant. Foliar application of Si resulted in the greatest Si concentration in leaves, and soil application increased Si concentration in leaves, stems, and roots. Silicon application, regardless of the application method, increased leaf area, specific leaf area, and pigment concentration (chlorophyll a and carotenoids) as well as photosynthesis and transpiration rates of wellwatered potato plants. However, only soil application increased P concentration in leaves and dry weight of leaves and stems. © Crop Science Society of America.

POPIN: a catalyst for a better international exchange of population information

Analiza las actividades del POPIN, cuyo objetivo es ayudar al establecimiento de nuevos servicios de información y coordinar el intercambio entre los existentes, compatibilizando las tareas para mejorar el flujo de información sobre población y la utilización de las fuentes disponibles. Incluye las recomendaciones de la Cuarta Reunión del POPIN realizada en Beijing entre el 22 y el 25 de octubre de 1986; y una lista descriptiva de sus publicaciones.