1. 关键资源
    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...
  2. 关键资源 1995-01-01 Fourteen chapters address various aspects of human waste or, as the editor puts it, the "by-products," of our increasingly urban and industrial society. Topics range from the societal, political, and regulatory issues associated with land application to more technical issues such as the negative...
  3. 1980-01-01 Among its other activities, FAO has focused on developing natural resources and approaches for their better utilization in order to increase food production in developing countires.This FAO book contains technical papers on soil and plant testing services in many different countries. Also...
  4. 2004-07-01 We read an article in Appropriate Technology (Volume 28, No. 3; July/September 2001) about farmers in Niger who used bottle caps to distribute tiny amounts of fertilizer. Despite drought conditions, farmers who used this technique harvested 50 to 100 percent more millet than those who did not.
  5. 2012-01-01 A question that we get asked at ECHO is “Are you an organic farm?” And the answer is “No. Because of our unique soils, climate and objectives, we do use herbicides, insecticides and mineral fertilizer as needed. At the same time, we aim to minimize our use of and reliance on expensive inputs.”...
  6. 1997-01-19 Information about making bonemeal fertilizer from animal bones.
  7. 2013-05-15 Sustainable Decentralized Water Treatment for Rural and Developing Communities Using Locally Generated Biochar Adsorbents An Introduction to Bokashi Fertilizers and Soil Amendments
  8. Anaerobic digestion, or biodigestion, involves the microbial degradation of organic materials in an oxygen-free environment. Feedstocks for anaerobic digestion include livestock manures, crop residues, culled fruit and vegetables, food waste, and other organic by-products. The process produces...
  9. 1994-07-19 Nitrogen fertilizer should not be applied to trees and shrubs directly after transplanting.
  10. 2014-04-20 Comfrey is a unique perennial plant that requires minimal maintenance after planting and that can give high, sustained yields of nutrient-rich leaves for use as fertilizer, animal feed and more. It is high in potassium (K) and other micronutrients, and seems to improve fruiting and disease...