Published online by Cambridge University Press: 12 June 2017
Need for reliable information concerning the effects of environment on the response of plants to herbicides motivated the construction of the controlled environment system described herein. A unit suitable for such studies should have these general specifications: 1. a useful range of control of light, temperature, and relative humidity; 2. no recirculation of air, to avoid overall contamination of the unit by volatile herbicides; 3. capability of maintaining several sets of conditions simultaneously; and 4. a design which may be modified easily. The system described was constructed with these points in mind.
4 Lighting-system components suggested by M. W. Parker, Crops Research Division, A.R.S., U.S.D.A., Beltsville, Maryland. Google Scholar
5 The hygrostat consists of a controller with remotely mounted electric sensing element. Google Scholar
6 Mimeographed list of the source and cost of components will be supplied by authors on request. Google Scholar