This manual, prepared for use by Peace Corps volunteers in developing countries, has been designed as an on-the-job reference for soil management and fertilizer use at the small farmer level. It provides information on yield-boosting techniques, especially in the areas of soil conservation, organic and chemical fertilizer use, and the safe and appropriate use of agricultural chemicals. The text is written in a "how to" format, in as nontechnical language as possible, and takes a problem-solving approach to soil management and fertilizer use. Organized into nine sections, the text covers the following topics: soil basics, spotting and fixing soil physical problems, seedbed preparation, soil fertility basics, determining fertilizer needs, how to use organic fertilizers and soil conditioners, chemical fertilizers, liming soils, and salinity and alkalinity problems. An appendix to the manual provides conversion tables, composition of common fertilizers, information on soil moisture content, erosion control approaches, and hunger signs in common crops. (KC)