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Search Result For: "Soil"

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137 items found (Showing 1 - 10)

  1. ECHO Asia Intro to Soil Science

    Key Resource
    This 4 part training gives a broad overview and introduction to some basic soil characteristics: phases (solid, liquid, gas), texture, density, structure, reaction (pH), plant-water relationships, organic matter, biology and nutrients. After some classroom discussion we went head out to into the...
    Soil science Soil Profiles Soil Testing Plant Health Asia
     

  2. Acid Soils of the Tropics

    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...
    Soil Micronutrients Acidity Alkaline Nitrate Ammonium Fertilizer Lime Calcium Soil pH
     

  3. An Introduction To Soil Fertility

    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...
    Acidic Soil Soil Fertility Soil Nutrients Plant Nutrition Soil Health Plant Health
     

  4. Understanding Salt-Affected Soils

    Key Resource
    2016-08-17 Farmers and gardeners in semi-arid and arid regions of the world face two associated but separate problems, which limit the crops they can grow and the yield of these crops. The underlying problem is lack of rainfall needed for growing plants. The second is accumulation of salts in the root zone....
    Saline Soils Salt Tolerance Lab Protocol Soil Remediation Salinity Soil Health
     

  5. Biochar: An Organic House for Soil Microbes

    Key Resource
    2013-06-01 Rick Burnette wrote an article for Issue 7(July 2010) of ECHO Asia Notes, titled “Charcoal Production in 200-Liter Horizontal Drum Kilns.” My article takes the charring process a step further by exploring the rapidly re-emerging world of biochar. Biochar is a form of charcoal, produced through...
    Soil Microorganisms Biochar
     

  6. Best Practices in Improving Degraded Land

    Key Resource
    2012-11-14 The UNCCD estimates that over 250 million people are affected by land degradation, and about 1 billion people in over 100 countries are at risk. According to the WMO, 33% of the world’s land surface is vulnerable to land degradation.Degraded lands lead to overall reduced productivity and reduced...
    Soil Management Soil improvemnt Saline Soils Land Degradation
     

  7. Carbon Farming: Building Soils and Stabilizing the Climate

    Key Resource
    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...
    Carbon Sequestration
     

  8. Best Practices in Conservation Agriculture

    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...
    Conservation Agric... Mulch Soil Conservation Plant Diversity Crop Diversity Soil Disturbance Soil Fertility Soil Remediation Soil Erosion
     

  9. Nutrient Quantity vs Access

    Key Resource
    2014-01-01 In order to achieve high levels of agricultural productivity in the tropics at the lowest possible economic and ecological costs, we need to properly understand the relationship between nutrients in the soil and crop productivity. For this to happen, the current understanding needs to change. The...
    Soil Nutrients Ecological Restora... Soil Fertility Agricultural Produ...
     

  10. Vermiculture Basics & Vermicompost

    Key Resource
    2010-08-01 Worm or vermiculture is a useful technique for recycling kitchen and livestock wastes into a rich organic fertilizer, for producing high-protein feed for poultry and initiating a lucrative business selling worms and worm castings for the small farm. Worms are invaluable partners in building the...
    Red Worm Vermicompost Vermiculture Worm Casting