Abstract
Barley plants were cultivated in a nutrient solution for 4 days and then in Al solution for the next 3 days, this alternating method being practiced, and the plants were cropped after 9 weeks. Al concentrations, rise above 5 ppm, proved to have a considerable important effect on the dry weight of the plant and on Al accumulation in the roots. These unfavorable influences exerted by Al^… may be removed more or less by increasing doses of phosphate or calcium. Uptake of Ca and probably of Mg by the plant from a nutrient solution were reduced in the presence of Al^…; the ratio of CaO/MgO was decreased, while that of K_2O/CaO was increased.
