Heiner Lieth has been a professor and extension specialist in the plant sciences at UCDavis for 30 years. He conducts research, teaches, and extends on plant production in protected cultivation (greenhouse, nursery, in-door) using various technologies. Lieth's research focuses on the relationship between environmental variables and soilless crop production. This research includes a variety of projects ranging from basic to applied research. Basic research projects focus on quantification (through the use of mathematical models) of plant and crop processes. His applied research deals with production optimization, soilless (hydroponic) production of horticultural crops, greenhouse automation, and the development of production-management tools. As part of this, Lieth uses and develops technologies (photovoltaics, LED lighting, nutrient sensing, hydroponics, etc) and looks for feasibility in commercial production. One area of particular interest to Lieth is the dual use of agricultural lands for simultaneously growing plants and generating electricity. He is also working on integrating a complete set of technologies into a hydroponic system that can be sustainable and applicable in conditions where plant production has traditionally not been possible or economically feasible, particularly in-door agriculture.