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6440 items found (Showing 41 - 50)
  1. Key Resource 1989-01-01 The aim of this guide is to present results of scientific research on pruning in a way that can be understood easily by all people who care about trees. In this guide I discuss pruning for the desires of man, but also for the health of the trees and their associates. I have tried to make this...  
  2. Key Resource 1988-01-01 2 Copies of 1988 Version This manual is designed to assist those who plan and implement small-scale agricultural projects. By promoting awareness of environmental concerns, the manual can increase the development worker's ability to design projects that are both environmentally sound and...  
  3. Key Resource 1992-03-01 Amazon.com Description Water is everywhere - its physics and chemistry, rain, evaporation, infiltration, underground, the intimate relationship between life and water, and other natural phenomena. Its effects and applications need to be understood: run-off, erosion, soil drainage and irrigation....  
  4. Key Resource 1989-01-19 If you are going abroad and want to learn the language of your host country, The Whole World Guide To Language Learning is the book for you! Whether you enroll in formal language classes or work language learning into a busy schedule, Terry Marshall's in situ (on location) approach to language...  
  5. Key Resource 1998-06-01 This is a much needed practical handbook which bridges the gap between nutritional problems and agricultural solutions. This book helps community workers and local groups identify nutritional needs and grow the required food crops organically.  
  6. Key Resource 1989-06-01 Formerly separate publications, the text and dictionary are combined into a one-volume complete guide to Shigo’s album of facts, photos, philosophies, and terminology regarding trees, their problems, and their proper care. On the basis that trees support more integrated groups of living things...  
  7. Key Resource 2014-05-01 This 2014 printing features updated antiretroviral information based on new World Health Organization (WHO) guidelines to treat HIV and prevent mother-to-child transmission. Other updated topics include: treatment of sexually transmitted infections (STI's); family planning; cervical, breast and...  
  8. Key Resource 1989-01-01 Six out of every ten of the world's people are being inexorably pushed by agricultural modernization and continuing high population growth rates into ecologically vulnerable environments: tropical forests, dryland and hilly areas, and the fringes of great urban centers. Unless development...  
  9. Key Resource 1993-01-01 The purpose of this booklet is to present a group of tiny aquatic plants commonly known as "duckweeds' as a promising new commercial aquaculture crop. Section 1 presents basic information on duckweed biology. This paper summarizes current knowledge, gained from practical experience from the...  
  10. Key Resource 1990-01-01 "Permaculture" (permanent agriculture) is the conscious design and maintenance of economical, agriculturally productive ecosystems that have the diversity, stability, and resilience of natural ecosystems. While focusing on agriculture, it also establishes the importance of integration between...