1. 01-01-1980 This book is one of a series of manuals on renewable energy technologies. It is primarily intended for use by people in international development projects. The construction techniques and ideas presented here are, however, useful to anyone seeking to become energy self-sufficient. 80 pages,...
  2. 06-01-1980 This book on making charcoal by the retort method is primarily for people in international development. It includes information on construction, operation, and maintenance when using the retort method. 27 pages, illustrations
  3. This manual is designed for development assistance workers and others who are planning or managing small-scale livestock projects. Although aimed specifically at those working in less-developed areas of the tropics and subtropics, these environmental guidelines apply to almost any region of the...
  4. 01-01-1981 The purpose of this book is to show local farmers and others the basic steps to design, execute, and measure an agricultural experiment. This book does not cover statistical anlysis; it is assumed that trained statisticians are available for this purpose.
  5. 01-01-1981 This prefabricated greenhouse can be added to the south side of an existing house for under $225.
  6. 01-01-1990 Intensively cultivated vegetable gardens can supply a great deal of a family's food from very little land. However, to maintain their productivity, these gardens require a lot of fertilizer and some special techniques, which are discussed below. As one crop is finished, another is put in its...
  7. 01-01-1990 Since 1950, soybeans have become a valuable part of the world's food supply and of the systems that produce and deliver food. Production of soybeans has grown rapidly and in 1990 amounted to approximately 100 million metric tons (MMT) annually. This compares with about 500 MMT each for rice and...
  8. 01-01-1986 Cereal crops, or grains, include a wide variety of plants that are members of the grass family (Gramineae) grown for their hard seeds or kernels, which are used primarily for food. Grains are rich in carbohydrates and contain substantial amounts of protein, as well as some fat and vitamins. They...
  9. 01-01-1986 Cereal crops, or grains, include a wide variety of plants that are members of the grass family (Gramineae) grown for their hard seeds or kernels, which are used primarily for food. Grains are rich in carbohydrates and contain substantial amounts of protein, as well as some fat and vitamins. They...
  10. 01-01-1984 Root crops is a general term commonly used for a wide variety of food plants that have an underground storage organ known as a root, tuber (rhizome), corm, or bulb. Root crops are rich in starch, and low in protein and oil. They are excellent sources of calories. Some are consumed as major...