Evaluation of yield advantage indexes in carrot-lettuce intercropping systems

The aim of this study was to estimate the effect of the association between carrot and lettuce crops in several intercropping systems through different yield advantage indexes, as well as to assess which system is better for the environmental resources management with respect to productivity and economic indicators. A 'group balanced block' experimental design was used, with four replications. Cultivars of lettuce crispleaf ('Lucy Brown', 'Tainá', 'Laurel' and 'Verônica') and looseleaf ('Babá de Verão', 'Maravilha das Quatro Estações', 'Elisa' and 'Carolina') groups were evaluated in intercropping systems with 'Alvorada' and 'Brasilia' carrot cultivars. The land equivalent ratio (LER) and yield efficiency index (YEI) were estimated, besides economic indicators such as gross (GI) and net (NI) income, modified monetary advantage (MMA), return rate (RR) and profit margin (PM). The evaluated indexes showed that carrot is the dominant and lettuce the dominated crop. Higher biological/agronomic efficiency indexes and economic indicators were observed in intercropping systems with 'Brasilia' carrot as component crop and that based on the crispleaf lettuce group.

ECLAC Development of official statistics in the region. Report of the Economic Commission for Latin America and the Caribbean on the development of official statistics in Latin America and the Caribbean

This document was prepared by the Economic Commission for Latin America and the Caribbean (ECLAC); and offers a description of the main trends in the development of official statistics in Latin America and the Caribbean and the principal challenges in that regard.The first chapter provides an analysis of the state of development of statistical production in the region, based on statistical information for 41 Latin American and Caribbean countries and eight specific areas. The institutional organization of national statistical systems in the region is also described. Chapter II examines the history and current status of mechanisms for regional and subregional coordination and of the Statistical Conference of the Americas of ECLAC. Chapter III describes the main challenges for official statistics in the countries of the region and the strategies that the Statistical Conference of the Americas and ECLAC propose to implement in order to address them.

Economic survey of the Caribbean, 2007-2008

Includes bibliography

Social protection systems in Latin America and the Caribbean: Uruguay

Includes bibliography

Social protection systems in Latin America and the Caribbean: Trinidad and Tobago

Includes bibliography

Social protection systems in Latin America and the Caribbean: El Salvador

Incluye bibliografía

Social protection systems in Latin America and the Caribbean: Perú

Incluye bibliografía

Social protection systems in Latin America and the Caribbean: Cuba

Includes bibliography

Social protection systems in Latin America and the Caribbean: Nicaragua

Incluye bibliografía

Social protection systems in Latin America and the Caribbean: Honduras

Incluye bibliografía

Social protection systems in Latin America and the Caribbean: Brazil

Incluye bibliografía

Social protection systems in Latin America and the Caribbean: Jamaica

Includes bibliography

Social protection systems in Latin America and the Caribbean: Haiti

Includes bibliography

Social protection systems in Latin America and the Caribbean: Colombia

Includes bibliography

Social protection systems in Latin America and the Caribbean: Plurinational State of Bolivia

Includes bibliography