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90 items found (Showing 1 - 10)
  1. 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...  
  2. 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...  
  3. 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population growth, have little choice but to crop their land continuously, with scarce resources to replace nutrients withdrawn by each successive crop.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...  
  4. Key Resource 1996-09-01 Amazon.com Description Indigenous soil and water conservation practices are rarely acknowledged in the design of conventional development projects. Instead, the history of soil and water conservation in Africa has been one of imposing external solutions without regard for local practice. There is...  
  5. Key Resource
    2019-05-21 Smallholder farmers around the world face some of the harshest growing conditions globally, yet they produce the majority of the world’s food. Soils in these areas often lack nutrient and water holding capacities, due to erosion or poor soil structure. These obstacles can be staggering for...  
  6. Key Resource 1989-01-02 This book is a review of the potential of agroforestry for soil conservation, treated in its wider sense to include both control of erosion and maintenance of fertility. The objectives are: To summarize the present state of knowledge on agroforestry in soil conservation, including both known...  
  7. Key Resource 2004-08-02 Amazon.com Description This fully revised and expanded edition of Fundamentals of Soil Ecology continues its holistic approach to soil biology and ecosystem function. Students and ecosystem researchers will gain a greater understanding of the central roles that soils play in ecosystem development...  
  8. Key Resource 2000-01-20 Soil Biology Primer Authors: Dr. Elaine Ingham Andrew R. Moldenke & Clive A. Edwards Limited Availibility online. Buy it here NOW!! For farmers, ranchers, ag professionals, resource specialists, conservationists, soil scientists, students and educators. The Soil Biology Primer is an...
     
  9. 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...
     
  10. Key Resource 2002-01-01 The now venerable textbook, founded in 1922, introduces the fundamental principles of soil science both for students whose only expose to the discipline will be the one class, and for those embarking on a career in it. It emphasizes throughout the soil as a natural resource, highlighting its...