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  1. 2018-10-31 This article is from ECHO Asia Note # 36. Soil chemical, physical, and biological properties range from those highly favorable to plant growth to those highly unfavorable to plant growth. It is rare—especially in the tropics—to find a soil in its natural state in which all properties are highly...  
  2. Key Resource 2009-01-20 All plants need certain mineral elements for proper growth, development, and maintenance. The basic structure of all organisms is built of carbon (C), oxygen (O) and hydrogen (H). Plants obtain these elements from water (H2O) in the soil and carbon dioxide (CO2) in the air, so no input is...  
  3. Key Resource 2002-01-01 Acidification of soil is a natural process with major ramifications on plant growth. As soils become more acid, particularly when the pH drops below 4.5, it becomes increasingly difficult to produce food crops. As soil pH declines, the supply of most plant nutrients decreases while aluminum and a...  
  4. Key Resource
    2016-09-28 Farmers in many parts of the world, because of human population growth, have little choice but to crop their land continuously, with scarce resources to replace nutrients withdrawn by each successive crop. Crop residues are often lost as a source of organic matter and mulch, usually through...  
  5. 2008-07-20 CHOfarm manager Danny Blank says that the principles in EDN 96 “revolutionized the way I look at the land and understand the impact agriculture practices have on the overall health of soils.”  
  6. 2011-01-20 EDN 96, published in July 2007, featured an article by Danny Blank called “A Fresh Look at Life below the Surface.” The article, written after Danny attended a week-long workshop by Dr. Elaine Ingham, discussed composting and the importance of using it to build up the Soil Food Web—the community...  
  7. 2013-01-31 This is a laboratory protocol that outlines methodsof extracting, and analyzingNO3- from soil.  
  8. 2004-01-20 When selecting a hedgerow species for alley cropping, keep in mind that leaves should readily decompose when applied to the soil.  
  9. 2017-02-15 This report describes and analyzes the soil distribution and characteristics of the main soil types in Mainland Southeast Asia (MSEA) that comprise the countries of Cambodia, Lao PDR, Myanmar, Thailand, and Vietnam. This article is from ECHO Asia Note #30  
  10. 2013-12-20 Soil quality, also known as soil health, is the capacity of the soil to function – how well it fills the roles we need it to, whether in a natural or managed ecosystem. A variety of measures are used to gauge soil health; although we can use these characteristics as indicators of soil quality,...