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Soil fertility is the overriding constraint to food production in the tropics, and yet in many developing countries fertilizers are unavailable or beyond the reach of subsistence farmers. The biological fixation of atmospheric nitrogen is the only way that plants can manufacture their own fertilizer and is the main input of nitrogen in many tropical cropping systems.



  1. El cabello de ángel es un árbol frondoso, vigoroso, fijador de nitrógeno, que puede crecer con rapidez en suelos pobres. El árbol responde bien a la poda de rebrote, es una buena fuente de leña y las hojas proporcionan un forraje excelente. Se utiliza para enriquecer el suelo y proporcionar...
  2. El madero negro (gliricidia, madre de cacao, madriado, matarratón, piñon de Cuba) es un árbol fijador de nitrógeno de crecimiento rápido de hasta 15 m de altura. Se utiliza para cercas vivas, abono verde, forrajes, producción de miel, rompevientos y leña. Este árbol tolera suelos secos, ácidos,...
  3. El género Leucaena incluye varias especies de árboles multipropósito e híbridos interespecíficos que pueden soportar casi cualquier tipo o frecuencia de poda general o de rebrote. Son nativos de México y América Central, y ahora abundan en Filipinas, África Occidental, Nepal, Australia y Hawai....
  4. Common nitrogen fixing trees for fodder production summarized by mean annual rainfall and mean annual temperature.
  5. Nitrogen fixing trees (NFTs) are special in their potential for agroforestry planting. Through nitrogen fixation, this critical soil nutrient is extracted from the atmosphere and converted to a form usable by plants. The trees don’t perform this process but instead this is done by symbiotic soil...
  6. NFTA 89-02, May 1989 A quick guide to useful nitrogen fixing trees from around the world Of Australia’s tropical area, almost 2 million km2receives less than 500 mm of rainfall annually. Soils are diverse, but typically low in plant nutrients, with widespread and severe deficiencies in phosphorus...
  7. FACT sheets on multipurpose trees.Aimed at extension agents, field researchers, community leaders, and farmers, these two-page summaries of current information are a handy reference for introducing promising multipurpose trees into research and planting programs. All FACT sheets are available in...

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