Many farm and nonfarm workers require skills and knowledge of agriculture to perform their jobs. The 1970 Census of Population classified a sample of 20 percent of all persons by occupation and industry of primary employment. Those occupation-industry classifications which required competency in agriculture were identified. A compilation was made of the number of workers in each industry-occupation category by class of worker for each State. These data can be used to develop labor placement programs and assist educators to develop programs of instruction. Guidance counselors should be better able to help students with occupational information, while employment counselors can indicate potential opportunities. Planning agencies will be able to determine those industries most suitable for an area. These data are presented in 11 volumes; one volume (ERS-570) contains summary data for all States while State data are in ten regional volumes.