Related items
Showing items related by metadata.
-
DocumentOther documentDegradación de las cortinas rompevientos al este de la ciudad de León, Nicaragua 2001
Also available in:
No results found.En la década de los años 80, se establecieron 1120 km de cortinas rompevientos al este de la ciudad de León, Nicaragua para controlar la erosión eólica. Se evaluaron las condiciones de las cortinas 20 años después de su establecimiento y cómo los productores las utilizan y manejan. Se muestrearon 100 segmentos de cortinas (de 100 m lineales cada uno) seleccionados al azar de mapas originales de las cortinas. En cada segmento se evaluó: ancho de la cortina, número de filas, densidad de plantas, i ndicios de incendio, número de troncos muertos, y número y largo de brechas. En los árboles vivos presentes se midió el diámetro del tallo, altura total, altura comercial y número de rebrotes. Para conocer el manejo y uso de las cortinas se entrevistaron 33 productores. El 75% de las cortinas todavía existe, pero casi todas han sido degradadas por incendios, extracción de leña y madera y la expansión de áreas de cultivo. La densidad actual de plantas en las cortinas es del 17% de la densidad ori ginal y no es suficiente para la protección del viento. Se estimó un volumen maderable de 63373 m3 Scc (sólidos con corteza) en 630.11 km de cortina. Los productores reconocen la importancia de las cortinas, pero no las manejan en forma sostenible. Para rehabilitar estas cortinas, será necesario replantar árboles y mejorar su manejo -
No Thumbnail AvailableDocumentOther documentCuantificación del carbono almacenado en el suelo de un sistema silvopastoril en la zona Atlántica de Costa Rica 1999
Also available in:
No results found.Los sistemas silvopastoriles son potenciales sumideros de carbono (C) que pueden contribuir a mitigar el efecto de las emisiones globales de C. En un estudio de caso en la Zona Atlántica de Costa Rica, un suelo Typic Tropofluvent de fertilidad media almacenó 233 Mg C ha-1 en los primeros 50 cm de suelo cuando el uso de la tierra era un pastizal puro de pasto guinea (Panicum maximum). En sistemas silvopastoriles de laurel (Cordia alliodora) de regeneración natural (<3, 3-7 y >7 años) en pastizale s de P. maximum, el C acumulado varió entre 180-200 Mg ha-1 dependiendo de la edad de los árboles. Las concentraciones de C en el suelo disminuyeron con la profundidad del suelo y con la distancia a los árboles. La variabilidad de la distribución del C aumentó con la profundidad del suelo y con la edad de los árboles. -
DocumentProgramme / project reportRehabilitaciòn de espacios degradados 2001Este nmero de Unasylva se ocupa de las tcnicas, pero tambin de los aspectos polticos y sociales, de la rehabilitacin forestal de determinados espacios degradados.
Users also downloaded
Showing related downloaded files
-
Book (series)FlagshipThe State of Food Security and Nutrition in the World 2021
Transforming food systems for food security, improved nutrition and affordable healthy diets for all
2021In recent years, several major drivers have put the world off track to ending world hunger and malnutrition in all its forms by 2030. The challenges have grown with the COVID-19 pandemic and related containment measures. This report presents the first global assessment of food insecurity and malnutrition for 2020 and offers some indication of what hunger might look like by 2030 in a scenario further complicated by the enduring effects of the COVID-19 pandemic. It also includes new estimates of the cost and affordability of healthy diets, which provide an important link between the food security and nutrition indicators and the analysis of their trends. Altogether, the report highlights the need for a deeper reflection on how to better address the global food security and nutrition situation.To understand how hunger and malnutrition have reached these critical levels, this report draws on the analyses of the past four editions, which have produced a vast, evidence-based body of knowledge of the major drivers behind the recent changes in food security and nutrition. These drivers, which are increasing in frequency and intensity, include conflicts, climate variability and extremes, and economic slowdowns and downturns – all exacerbated by the underlying causes of poverty and very high and persistent levels of inequality. In addition, millions of people around the world suffer from food insecurity and different forms of malnutrition because they cannot afford the cost of healthy diets. From a synthesized understanding of this knowledge, updates and additional analyses are generated to create a holistic view of the combined effects of these drivers, both on each other and on food systems, and how they negatively affect food security and nutrition around the world.In turn, the evidence informs an in-depth look at how to move from silo solutions to integrated food systems solutions. In this regard, the report proposes transformative pathways that specifically address the challenges posed by the major drivers, also highlighting the types of policy and investment portfolios required to transform food systems for food security, improved nutrition, and affordable healthy diets for all. The report observes that, while the pandemic has caused major setbacks, there is much to be learned from the vulnerabilities and inequalities it has laid bare. If taken to heart, these new insights and wisdom can help get the world back on track towards the goal of ending hunger, food insecurity, and malnutrition in all its forms. -
BookletCorporate general interestEmissions due to agriculture
Global, regional and country trends 2000–2018
2021Also available in:
No results found.The FAOSTAT emissions database is composed of several data domains covering the categories of the IPCC Agriculture, Forestry and Other Land Use (AFOLU) sector of the national GHG inventory. Energy use in agriculture is additionally included as relevant to emissions from agriculture as an economic production sector under the ISIC A statistical classification, though recognizing that, in terms of IPCC, they are instead part of the Energy sector of the national GHG inventory. FAO emissions estimates are available over the period 1961–2018 for agriculture production processes from crop and livestock activities. Land use emissions and removals are generally available only for the period 1990–2019. This analytical brief focuses on overall trends over the period 2000–2018. -
Book (stand-alone)Technical bookRussian Federation: Meat sector review
Country highlights prepared under the FAO/EBRD Cooperation
2014Also available in:
World food demand has seen massive changes, including a shift from staple foods to animal proteins and vegetable oils. In the short to medium term, this trend in global food demand will continue. There will be an increased demand for vegetable oils, meat, sugar, dairy products and livestock feed made from coarse grains and oilseed meals. There are numerous mid-term forecasts for the Russian Federation’s meat sector. Most of them agree on the following trends: (i) the consumption of poultry and p ork meat will increase; (ii) the consumption of beef will decrease or stabilize; and (iii) the Russian Federation will remain a net importer of meat on the world market. According to OECD and FAO projections, meat imports from the Russian Federation will decrease from 3 to 1.3 million tonnes, owing to an anticipated growth in domestic chicken meat and pork production. The country’s share in global meat imports is anticipated to decrease from 12 percent in 2006–2010, to 4 percent in 2021. While t he Russian Federation will continue to play an important role in the international meat market, it will fall from its position as the largest meat importing country in 2006–2010 to the fourth largest global meat importer by 2021, behind Japan, sub-Saharan African countries, and Saudi Arabia.