Agricultural Engineering (AGEN) emphasizes coursework in one of three engineering areas: machine design, test, or soil and water resources. Thus, some agricultural engineers are involved in the analysis and design of field machinery systems and machine components through the study of the principles of mechanical design, joining techniques, hydraulics, controls, ergonomics, and safety. Other Agricultural Engineers evaluate machine or mechanical system functional performance based on a study of test procedure standards, measurements, data acquisition, electronic communication and statistics, and practical experience gained at the Nebraska Tractor Test Laboratory. Still, others are analyzing and designing soil and water management-related infrastructure as aided through the study of irrigation, drainage, erosion and runoff control techniques, crop tillage and cultivation practices, and natural resources management. Job opportunities for graduates are available in the industry, public agencies, consulting, and private practice.