Adaptable Acacias
Animal Forage, Plant Systems, Rehabilitation, Trees — by Leza Bennetts
by Leza Bennetts and Erika Birmingham
Acacias are evergreen, nitrogen-fixing plants ranging in form from ground covers to tall trees. There are more than 1200 species worldwide.
There are many roles for acacias in permaculture design such as increasing soil fertility through nitrogen fixation, rehabilitation of degraded soils and in reforestation. They are useful for erosion control due to their rapid growth and effective seed dispersal, and many species sucker readily.
Most species are extremely hardy and drought tolerant and some are salt tolerant, making acacias particularly valuable in arid regions as timber, firewood, food and fodder for stock during drought.
Comments (2)Posted on: October 23, 2008
Nitrogen Fixing Trees - The Multipurpose Pioneers
Animal Forage, Food Forests, Food Plants - Perennial, Fungi, Plant Systems, Rehabilitation, Soil Biology, Trees — by Craig Elevitch
The myths about the wonders of nitrogen fixing trees are many. Craig Elevitch and Kim Wilkinson explain how to use them effectively.
Nitrogen Fixing Trees for Permaculture
 Flowers of the leguminous tree, Kowhai, the national flower of New Zealand |
Nitrogen fixation is a pattern of nutrient cycling which has successfully been used in perennial agriculture for millennia. This article focuses on legumes, which are nitrogen fixers of particular importance in agriculture. Specifically, three legumes (nitrogen fixing trees, hereafter called NFTs) are especially valuable in subtropical and tropical permaculture. They can be integrated in a permaculture system to restore nutrient cycling and fertility self-reliance.
Comments (0)Posted on: September 29, 2008
The Development of Farmer Managed Natural Regeneration
Aid Projects, Animal Forage, Plant Systems, Trees — by Tony Rinaudo
Editor’s Note: Arguably one of the most successful land regeneration projects in the world, Farmer Managed Natural Regeneraton (FMNR), beginning in Niger during the 1980s, has revegetated three million hectares of arid land in that country alone - bringing back biodiversity in flora and fauna, increasing soil humus (and thus carbon) content, improving water retention and microclimates, and dramatically improving the health and viability of local communities. It is now practiced on over 30,000 km² of land in the Niger Republic as well as Chad, Burkina Faso, Ethiopia and Mali. It has been written about in many noteworthy publications (the NY Times, for example), and below we hear about its original development from the man who first discovered the ‘underground forest’. In short, trees have returned to Niger, and they’re bringing prosperity with them.
by Tony Rinaudo,
Natural Resource Management Advisor, Integration Team,
World Vision Australia. Originally published on Leisa
 Children helping to source firewood Photo: Author |
Conventional methods of reforestation in Africa have often failed. Even community-based projects with individual or community nurseries struggle to keep up the momentum once project funding ends. The obstacles working against reforestation are enormous. But a new method of reforestation called Farmer Managed Natural Regeneration (FMNR) could change this situation. It has already done so in the Republic of Niger, one of the world’s poorest nations, where more than 3 million hectares have been re-vegetated using this method. Farmer Managed Natural Regeneration involves selecting and pruning stems regenerating from stumps of previously felled, but still living trees. Sustainability is a key feature of the programme which requires very little investment by either government or NGOs to keep it going. The story in Niger can offer valuable insights and lessons for other nations.
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