Differential Aluminum Tolerance of Wheat and Barley Varieties in Acid Soils¹

Abstract

Synopsis Varieties of wheat and of barley differed widely in their tolerance to acid soils containing high levels of KCl‐extractable Al. With few exceptions, varieties developed in the eastern United States were more tolerant than those developed in the Plains and Western States. Wheat varieties from Brazil were exceptionally tolerant. The results indicate that certain varieties have been selected for properties that are closely associated with their abilities to tolerate Al in acid soils.