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1985 items found (Showing 31 - 40)
  1. 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...  
  2. 2019-05-15 Soil erosion poses a major threat to global food security and to the achievement of the Sustainable Development Goals (SDGs). Find out more about the effects of soil erosion and the ways we can prevent it. --- FAO http://www.fao.org/global-soil-partne...
     
  3. 2018-02-06 Speaker Bio: Dr. Tom Thompson is Associate Dean and Director of International Programs in the College of Agriculture and Life Sciences and Professor of Agronomy at Virginia Tech. He earned B.S. , M.S. , and Ph.D. degrees in agronomy and soil science. He was an academic department head at two...  
  4. 2014-10-27 A-frame levels can be used to trace contour lines for soil conservation, or irrigation ditches at % slope. They are highly accurate, and cost nothing.  
  5. 2014-10-20  
  6. 2013-02-20  
  7. 1997-01-19 Commonly called 'silk oak,' 'silver oak,' or 'grevillea,' Grivillea robusta, native to Australia, has become widely utilized in agroforestry throughout Africa and other tropical regions, despite the fact that it is not a legume.  
  8. 2001-04-20 Soil acidity, or low pH, limits plant growth in many parts of the world. Although low pH can harm plants in many ways, this article will deal only with one of these factors, aluminum (Al) toxicity.Al is the third most abundant element on the earth (after oxygen and silicon), and the most abundant...  
  9. 2005-01-20 Maradi Integrated Development Project has forced me to question the wisdom of assuming that increases of organic content and fertility are always best.  
  10. 2004-01-20 When selecting a hedgerow species for alley cropping, keep in mind that leaves should readily decompose when applied to the soil.