Robert Hansen - Greenhouse Grower

Robert Hansen (hansen.2@osu.edu) is a retired adjunct assistant professor in the Department of Food, Agricultural and Biological Engineering at Ohio State University.

Manage pH And Soluble Salts In Hydroponics

By Robert Hansen|September 6, 2012

Save Water With Automation And Sensors

By Stephanie Burnett | Marc Van Iersel | George Meyer | Robert Hansen|July 9, 2012

Hydroponics Give Growers Control

By A.J. Both | Murat Kacira | Robert Hansen|May 25, 2012