These units of instructional materials and teaching aids are the final three of a series of eight designed for use in rural agriculture programs for students in grades 9 and 10. Covered in the unit on soil science and conservation of natural resources are collecting soil samples and applying soil sample test results. Growing vegetables and beautifying the homestead are examined. Discussed next are such aspects of agricultural mechanics as identifying, fitting, and using hand tools; using selected power tools; developing safe work habits in agricultural mechanics; and developing basic carpentry skills. Each of these units or problem area packets includes some or all of the following components: suggestions to the teacher, a content outline, a teacher's guide, information sheets, student worksheets or assignment sheets and keys, demonstrations, job sheets, transparencies, a discussion guide for the transparencies, and sample test questions and a teacher's key. (The remaining units are available separately--see note.) (MN)