OSU Biological Sciences Greenhouse On January 26th, we visited the Ohio State Greenhouse. The Superintendent, Emily Yoders-Horn, showed us around. Researchers use controlled growth chambers for different products; Soil is manually prepared with pesticides and fertilizer Amount of light can be controlled by adding layers of tarps across roof, either manually or power controlled system Watering techniques can vary based on the application;; Manual watering and irrigation techniques are used based on research requirements