This manual provides learning activities for use in two vocational agriculture courses--ornamental horticulture I and agricultural technology I. These activities are intended as aids in the teaching of application of science principles. An introductory chart gives a summary of how vocational agriculture objectives match objectives of specific science courses. A listing of both vocational agriculture and science objectives follows. All of the 67 laboratory activities that make up the bulk of the manual are components of the unit entitled "Plant Growth and Development." Fifteen subunits are plant anatomy, plant physiology, media, plant propagation (by seeds, cuttings, and layerage), transplanting, chemical regulation, environmental factors, plant nutrition, soil management, composting, chemical safety, chemical application, and turfgrass management. One to 15 exercises are provided for each subunit. Components of each laboratory exercise are title, objectives, materials, procedures, and discussion questions. (YLB)