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79 items found (Showing 21 - 30)
  1. Key Resource 2001-01-01 Access to clean drinking water remains one of the greatest challenges in the world. The BioSand Filter is one method that can be used for purifying water at the household level. With this filter, contaminated water is filtered through a natural biological layer and then layers of sand, pebbles...  
  2. 2001-01-01 There are many variations of sawdust cookstoves that have been used for many years both in North America and around the world. This sawdust cookstove model provides a low-cost, low-input method for producing a high intensity flame that will burn for up to five hours. The flame burns fairly clean...  
  3. 2001-01-01 When organic material decomposes under anaerobic conditions, it produces biogas which is a mixture of methane (CH4) and carbon dioxide (CO2) with small quantities of hydrogen, nitrogen, carbon monoxide and other compounds. Biogas can be used as a fuel source for cooking, heating, producing light...  
  4. 2001-05-20 For a long time, coconut farmers were able to live with the fate of declining harvests and incomes. In view of the current prices, this is no longer possible. It needs changes. The best option coconut farmers have to improve their livelihood is to diversify their farms. Fortunately, common...  
  5. 2002-01-01 A composting toilet is any system that converts human waste into compost through the natural breakdown of organic matter. The photo above shows a composting toilet from the late 1800’s. Composting toilets provide a sanitary method to recycle human waste while conserving water and protecting the...  
  6. 2002-10-01 We recently learned of a simple technique that may reduce bacterial wilt in tomatoes. Interplanting (or pre-planting) Chinese chive with tomato results in allelopathic suppression of the organism responsible for bacterial wilt. Bacterial wilt is a disease that affects many different crops,...  
  7. 2004-07-01 Agroforestry: In its simplest definition (as quoted by ECHO's Technical Note "Agroforestry Principles"), "agroforestry is the production of trees and of non-tree crops or animals on the same piece of land." It should be viewed more as a creative process than as a set technique because it is...  
  8. 2004-07-01 Alley cropping was not intended to be a way to increase yields/acre. The purpose was to shorten or eliminate fallow periods.  
  9. 2004-07-01 We read an article in Appropriate Technology (Volume 28, No. 3; July/September 2001) about farmers in Niger who used bottle caps to distribute tiny amounts of fertilizer. Despite drought conditions, farmers who used this technique harvested 50 to 100 percent more millet than those who did not.  
  10. 2005-07-20 Feedback from the ECHO networking with information on cookstoves and indoor pollution.