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928 รายการที่พบ (กำลังแสดง 1 - 10)
  1. ทรัพยากรหลัก So you want to help people in the tropics. Beautiful! The tropics are waiting for you. No matter what your abilities, you can make life better for others in the tropics. Your concern for the physical and spiritual well-being of people can be translated into fruitful service. Your first asset is...  
  2. ทรัพยากรหลัก
    20-01-2009 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. ทรัพยากรหลัก
    28-09-2016 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population growth, have little choice but to crop their land continuously, with scarce resources to replace nutrients withdrawn by each successive crop.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. ทรัพยากรหลัก
    14-11-2012 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...  
  5. ทรัพยากรหลัก
    06-04-2021 Part 2 of 4 in a series about Integrated Pest Management (IPM) Insect pests affect all forms of agricultural production, from densely planted field crops to high-value nursery plants to grains in storage. A pest management plan should start with foundational knowledge about local pest species and...  
  6. 03-10-2017 Soils of smallholder farmers are often depleted of organic matter and available soil nutrients, and may also be acidic and/or saline. We will review the causes and extent of these soil-related challenges in the developing world. A variety of possible management responses to these challenges will...  
  7. ทรัพยากรหลัก
    01-01-2010 Farming communities in the semi-arid tropical regions of Africa are becoming particularly vulnerable and face enormous challenges for their survival. Climate change, diminishing and unreliable rainfall, traditional mono culture cropping farming practices, high population growth, frequent famines...  
  8. 20-01-2011  
  9. 06-02-2018 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...  
  10. ทรัพยากรหลัก
    01-01-2012 Asia makes up less than one third (30%) of the world’s land area and yet carries over half (56%) of the world’s population. Moreover, the average population density of Asia becomes a significant long-term problem when food production is considered. Some countries in Asia have a population density...