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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. This short document contains graphs that show how zero tillage leads to increased water infiltration and increased water retention in soil.  
  3. 2012-10-01 This article is from ECHO Asia Note #15 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. There are a variety of measures used to gauge soil health and although we can use these...  
  4. 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,...  
  5. Salt buildup typically occurs in dry areas where evaporation exceeds precipitation. Over time, as water evaporates, the minerals left behind begin to accumulate. Plants need a certain amount of soluble salts, but when the salt content of soil water is greater than that of the water inside plant...  
  6. 2017-01-20 Using worms to create Living Soil results in : Nutrition: Delicious, nutrient-rich plants. Vitality: Plants growing in living soils are inherently stronger and need less protection, allowing low input food production methods to be used. Drought tolerance: Nutrients are in colloidal states rather...  
  7. Four nutrient deficiencies--phosphorus, potassium, nitrogen, and magnesium--can be diagnosed by observing maize leaves. This document includes photos of a healthy maize leaf and of maize leaves demonstrating each of these nutrient deficiencies. It also contains suggestions for how to address each...  
  8. 2013-12-15 Running a Diesel Engine on Biogas Research Note: Creating an Optimum Potting Mixture for Resource-Constrained Growers  
  9. 2017-02-02 Soils of Mainland Southeast Asia Permaculture in Development Book Review: The Independent Farmstead  
  10. 2012-10-01 Demystifying Soybean Production and Marketing: Our Experience in Laos Soil Quality Assessment: Why and How