1. The purpose of this book is to provide conservation organizations with a concise guide to information on threatened plants. Rather than providing information on each threatened plants, it shows how to find the information.
  2. 1997-01-01 The Nitrogen Fixing Tree Association has played a major rol in generating interest in and publishing information about nitrogen fixing trees. NFTA has sponsored research/ development agendas, workshops and conversations on the role of nitrogen fixing trees in society.
  3. Key Resource 1996-01-19 This is an easy-to-use guide to selecting hundreds of perennial species. It is indispensable for growers and designers working in subtropical and warm temperate/arid climates, and also includes some cool-climate tolerant species. Permaculture Plants: A Selection details hundreds of common and...