This document is a teacher's guide for a unit in vocational agriculture for college freshmen. It is intended to be used for 20 hours of instruction as an introductory course on the crop industry. It provides a broad background of the industry, including production, marketing, processing, and transportation, with emphasis on identifying major crops and their uses. It also covers the first phases of the production cycle. (Subsequent units in plant science and crop production build upon this unit.) The objectives of the unit are to help students to develop an understanding of the functioning of the crop industry; an ability to identify primary plant parts, major North Dakota crops and their uses, and prohibited and restricted noxious weeds; in addition to the ability to determine seed quality and to prepare seed for planting. The unit is divided into material for six jobs, as follows: (1) examining the crop industry; (2) identifying plant parts; (3) identifying major North Dakota crops and their uses; (4) identifying weeds; (5) determining seed quality; and (6) preparing seed for planting. Each of the jobs includes objectives, guide questions, references, an approach to interest students, key facts about the content of the material, worksheets, and transparency masters. (KC)