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  1. 关键资源 2015-07-23 Climate change will have a huge impact on the world’s poorest people. Crop yields have already gone down in the tropics and are projected to drop by 15-30% by 2080 in Africa, South Asia, and Central America (Hoffman 2013). Some countries could reach a 50% loss of agricultural productivity; in...  
  2. 关键资源 2013-06-03 With Practical Information on Landshaping, Water Security, Perennial Crops, Soil Fertility, Nutrient-dense food, and more The Resilient Farm and Homestead is a manual for developing durable, beautiful, and highly functional human habitat systems fit to handle an age of rapid transition. Ben Falk...  
  3. 关键资源 1998-12-28 A tool for developing and applying the science of agroforestry to problems of natural resources conservation and sustainable agricultural development, this book examines the environmental and social conditions that affect the roles and performance of trees in field- and forest-based agricultural...  

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