Record Display for the EPA National Library Catalog
RECORD NUMBER: 72 OF 72
|OLS Field Name||OLS Field Data|
|Main Title||Variation in Elemental Content of Lettuce Grown Under Base-Line Conditions in Five Controlled-Environment Facilities.|
|Author||Berry, Wade L. ; Krizek, Donald T. ; Ormrod, Douglas P. ; McFarlane, James C. ; Langhans, Robert W. ;|
|CORP Author||American Society for Horticultural Science, Mount Vernon, VA. Growth Chamber Committee.;Environmental Protection Agency, Washington, DC.|
|Additional Subjects||Growth ; Nutrients ; Lettuce ; Concentration(Composition) ; Plant tissues ; Phosphorus ; Potassium ; Calcium ; Metals ; Emission spectroscopy ; Comparison ; Analysis of variance ; Chemical analysis ; Laboratories ; Water pollution ; Reprints ;|
An interlaboratory comparison was made of the variation in elemental concentration of leaf lettuce (Lactuca sativa) plants grown under base-line conditions for 28 days in 5 controlled-environment facilities. Two studies were conducted by each of 5 investigators using a sphagnum peat-vermiculite mix obtained from a common source. Plant tissue from all studies was collected and analyzed at 1 laboratory for 10 essential elements (P, K, Ca, Mg, Fe, Mn, B, Zn, Cu, Mo) and 10 non-essential elements (Al, Si, Ti, Sr, Ba, Na, Pb, V, Li, and Sn) by arc emission spectrography. The 10 essential elements occurred at concentrations adequate for normal lettuce growth.