One of the main objectives of the National Aeronautics and Space Administration (NASA) is to develop a controlled ecological life support system (CELSS). Such a system is needed to harness solar energy for inhabitants of the earth and to set up manufacturing facilities in space. Before this gigantic step, NASA is interested in evaluating ground-based manned demonstration of CELSS (Mason and Carden, 1979).
Joshi, J. M. and Spence, Brenda L.
"Research Notes : Performance of soybeans, lima beans, and corn in pure and
Soybean Genetics Newsletter: Vol. 7
, Article 27.
Available at: http://lib.dr.iastate.edu/soybeangenetics/vol7/iss1/27