http://pec.lib.wvu.edu/record/P177381932Soluble aluminum studies: II. Minimum concentrations of aluminum found to be toxic to corn, sorghum, and barley in culture solutions.Journal article reprint from: <em>Soil Science</em>, v.34:no.4 (1932:Oct.).Ligon, W. S.Pierre, W. H. (William Henry), 1898-Growth (Plants)--Research.Soil acidity--Research.Barley--Effect of aluminum on.Aluminum.Sorghum--Effect of aluminum on.Corn--Effect of aluminum on.14256