Conceito e classificação da dormência em sementes

Despite being known to science for quite a long time, the phenomenon of seed dormancy still baffles the scientific community for the multiple complex underlying mechanisms. The current classification systems of seed dormancy attempt to condense all that is known about the phenomenon in an attempt to generate a conceptual database that would enable facilitated interpretation of upcoming information and allow for a better contextuation of research in this field. The present paper is a preliminary overview of the current panorama of concepts and classification systems of seed dormancy that intends to serve as a standpoint for future research in this field.

Shaping the future of social protection: access, financing and solidarity

Includes bibliography

White book of e-government interoperability for Latin America and the Caribbean: version 3.0

Includes bibliography

Impact of changes in the European Union import regimes for sugar, banana and rice on selected CARICOM countries

Includes bibliography

Compendium of practices on the implementation of ICT questions in households and businesses surveys in Latin America and the Caribbean 2010

Includes bibliography

Trade, poverty and complementary policies in Latin America

Includes bibliography

Indicadores de capacidades tecnológicas en América Latina

Incluye Bibliografía

Restoration of a degraded area using soil tillage systems in Campinas, São Paulo, Brazil

In Brazil the intensive agriculture use, mainly pasture, is the main cause of the presence of extensive areas of degraded lands. This study aimed to assess the impact of different soil management practices in a pasture degraded area used as garbage disposal. The experiment was performed at the Faculdade de Engenharia Agrícola, Universidade Estadual de Campinas - UNICAMP, in Campinas, state of São Paulo, Brazil, from 1990 to 1996. This area has undergone a process of recovery through removal of trash deposited on the surface, in 1985, levelling of soil, followed by application of limestone, subsoiling, planting of legumes (Crotalaria juncea) and crop rotation (soybean and maize). Since 1990 only popcorn maize was grown and established plots managed with different soil tillage systems, including harrow, chisel plow, moldboard plow, no tillage, disk plow and revolving hoe. One plot was planted exclusively with guinea grass (Panicum maximum) to serve as a reference for minimum loss of soil and another grown on a downhill direction to correspond to the expected maximum erosion. There were differences in sediment loss, nutrient loss and productivity of the popcorn maize in the period analyzed. The chisel plow and no tillage treatments caused the slightest loss of soil and nutrients, compared to other tillage systems. The results show that the soil management systems influenced the physical and chemical characteristics of soil, allowing an economical and environmental recovery of the area, providing the conditions for grain agricultural production.

Virtues and limitations of census maps for identifying critical deficiencies

Includes bibliography

The small economies of Latin America and the Caribbean

Includes bibliography

Mechanisms in the bed nucleus of the stria terminalis involved in control of autonomic and neuroendocrine functions: A review

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Draft biennial programme of regional and international cooperation activities of the Statistical Conference of the Americas of ECLAC, 2007-2009

Includes bibliography

Report on the implementation of the 2009-2011 biennial programme of regional and international cooperation activities of the Statistical Conference of the Americas of ECLAC

Incluye Bibliografía

Draft programme of regional statistical work for Latin America and the Caribbean, July 2005-June 2007

Includes bibliography

Roads towards gender equity in Latin America and the Caribbean

Includes bibliography